diff --git a/1000-hours/sounds-of-american-english/2.3.2-stress.md b/1000-hours/sounds-of-american-english/2.3.2-stress.md
index 7d20e79c..b59f7e99 100644
--- a/1000-hours/sounds-of-american-english/2.3.2-stress.md
+++ b/1000-hours/sounds-of-american-english/2.3.2-stress.md
@@ -81,55 +81,55 @@ In the upcoming sections, we'll be covering another important aspect of stressed
 
 Let's practice the pronunciation of the following commonly used multi-syllable words one by one. Pay attention to the *primary stress*, *secondary stress*, as well as *unstressed*, or *weak* `ə` (schwa) sounds:
 
-> * *accommodate* `/əˈkɑːmədeɪt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/accommodate-us-male.mp3" data-audio-us-female="/audios/us/accommodate-us-female.mp3"></span>
-> * *anniversary* `/ˌænəˈvɝːsɚi/` <span class="speak-word-inline" data-audio-us-male="/audios/us/anniversary-us-male.mp3" data-audio-us-female="/audios/us/anniversary-us-female.mp3"></span>
-> * *anticipate* `/ænˈtɪsəpeɪt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/anticipate-us-male.mp3" data-audio-us-female="/audios/us/anticipate-us-female.mp3"></span>
-> * *appreciate* `/əˈpriːʃieɪt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/appreciate-us-male.mp3" data-audio-us-female="/audios/us/appreciate-us-female.mp3"></span>
-> * *beautiful* `/ˈbjuːt̬əfəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/beautiful-us-male.mp3" data-audio-us-female="/audios/us/beautiful-us-female.mp3"></span>
-> * *celebration* `/ˌseləˈbreɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/celebration-us-male.mp3" data-audio-us-female="/audios/us/celebration-us-female.mp3"></span>
-> * *characteristic* `/ˌkerəktəˈrɪstɪk/` <span class="speak-word-inline" data-audio-us-male="/audios/us/characteristic-us-male.mp3" data-audio-us-female="/audios/us/characteristic-us-female.mp3"></span>
-> * *communication* `/kəˌmjuːnəˈkeɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/communication-us-male.mp3" data-audio-us-female="/audios/us/communication-us-female.mp3"></span>
-> * *determination* `/dɪˌtɝːmɪˈneɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/determination-us-male.mp3" data-audio-us-female="/audios/us/determination-us-female.mp3"></span>
-> * *discovery* `/dɪˈskʌvɚi/` <span class="speak-word-inline" data-audio-us-male="/audios/us/discovery-us-male.mp3" data-audio-us-female="/audios/us/discovery-us-female.mp3"></span>
-> * *encouragement* `/ɪnˈkɝːɪdʒmənt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/encouragement-us-male.mp3" data-audio-us-female="/audios/us/encouragement-us-female.mp3"></span>
-> * *entrepreneur* `/ˌɑːntrəprəˈnɝː/` <span class="speak-word-inline" data-audio-us-male="/audios/us/entrepreneur-us-male.mp3" data-audio-us-female="/audios/us/entrepreneur-us-female.mp3"></span>
-> * *environment* `/ɪnˈvaɪrənmənt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/environment-us-male.mp3" data-audio-us-female="/audios/us/environment-us-female.mp3"></span>
-> * *exaggerate* `/ɪɡˈzædʒəreɪt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/exaggerate-us-male.mp3" data-audio-us-female="/audios/us/exaggerate-us-female.mp3"></span>
-> * *examination* `/ɪɡˌzæməˈneɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/examination-us-male.mp3" data-audio-us-female="/audios/us/examination-us-female.mp3"></span>
-> * *explanation* `/ˌekspləˈneɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/explanation-us-male.mp3" data-audio-us-female="/audios/us/explanation-us-female.mp3"></span>
-> * *fascinating* `/ˈfæsəneɪtɪŋ/` <span class="speak-word-inline" data-audio-us-male="/audios/us/fascinating-us-male.mp3" data-audio-us-female="/audios/us/fascinating-us-female.mp3"></span>
-> * *government* `/ˈɡʌvɚnmənt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/government-us-male.mp3" data-audio-us-female="/audios/us/government-us-female.mp3"></span>
-> * *hospitality* `/ˌhɑːspɪˈtælət̬i/` <span class="speak-word-inline" data-audio-us-male="/audios/us/hospitality-us-male.mp3" data-audio-us-female="/audios/us/hospitality-us-female.mp3"></span>
-> * *imagination* `/ɪˌmædʒəˈneɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/imagination-us-male.mp3" data-audio-us-female="/audios/us/imagination-us-female.mp3"></span>
-> * *impossible* `/ɪmˈpɑːsəbəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/impossible-us-male.mp3" data-audio-us-female="/audios/us/impossible-us-female.mp3"></span>
-> * *incredible* `/ɪnˈkredəbəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/incredible-us-male.mp3" data-audio-us-female="/audios/us/incredible-us-female.mp3"></span>
-> * *independent* `/ˌɪndɪˈpendənt/` <span class="speak-word-inline" data-audio-us-male="/audios/us/independent-us-male.mp3" data-audio-us-female="/audios/us/independent-us-female.mp3"></span>
-> * *information* `/ˌɪnfɚˈmeɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/information-us-male.mp3" data-audio-us-female="/audios/us/information-us-female.mp3"></span>
-> * *inspiration* `/ˌɪnspəˈreɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/inspiration-us-male.mp3" data-audio-us-female="/audios/us/inspiration-us-female.mp3"></span>
-> * *interesting* `/ˈɪntrɪstɪŋ/` <span class="speak-word-inline" data-audio-us-male="/audios/us/interesting-us-male.mp3" data-audio-us-female="/audios/us/interesting-us-female.mp3"></span>
-> * *international* `/ˌɪnt̬ɚˈnæʃənəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/international-us-male.mp3" data-audio-us-female="/audios/us/international-us-female.mp3"></span>
-> * *knowledgeable* `/ˈnɑːlɪdʒəbəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/knowledgeable-us-male.mp3" data-audio-us-female="/audios/us/knowledgeable-us-female.mp3"></span>
-> * *opportunity* `/ˌɑːpɚˈtuːnət̬i/` <span class="speak-word-inline" data-audio-us-male="/audios/us/opportunity-us-male.mp3" data-audio-us-female="/audios/us/opportunity-us-female.mp3"></span>
-> * *personality* `/ˌpɝːsənˈælət̬i/` <span class="speak-word-inline" data-audio-us-male="/audios/us/personality-us-male.mp3" data-audio-us-female="/audios/us/personality-us-female.mp3"></span>
-> * *photography* `/fəˈtɑːɡrəfi/` <span class="speak-word-inline" data-audio-us-male="/audios/us/photography-us-male.mp3" data-audio-us-female="/audios/us/photography-us-female.mp3"></span>
-> * *professional* `/prəˈfeʃənəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/professional-us-male.mp3" data-audio-us-female="/audios/us/professional-us-female.mp3"></span>
-> * *recognition* `/ˌrekəɡˈnɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/recognition-us-male.mp3" data-audio-us-female="/audios/us/recognition-us-female.mp3"></span>
-> * *rehabilitation* `/ˌriːhəˌbɪləˈteɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/rehabilitation-us-male.mp3" data-audio-us-female="/audios/us/rehabilitation-us-female.mp3"></span>
-> * *relationship* `/rɪˈleɪʃənʃɪp/` <span class="speak-word-inline" data-audio-us-male="/audios/us/relationship-us-male.mp3" data-audio-us-female="/audios/us/relationship-us-female.mp3"></span>
-> * *responsibility* `/rɪˌspɑːnsəˈbɪlət̬i/` <span class="speak-word-inline" data-audio-us-male="/audios/us/responsibility-us-male.mp3" data-audio-us-female="/audios/us/responsibility-us-female.mp3"></span>
-> * *revolutionary* `/ˌrevəˈluːʃəneri/` <span class="speak-word-inline" data-audio-us-male="/audios/us/revolutionary-us-male.mp3" data-audio-us-female="/audios/us/revolutionary-us-female.mp3"></span>
-> * *satisfaction* `/ˌsæt̬ɪsˈfækʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/satisfaction-us-male.mp3" data-audio-us-female="/audios/us/satisfaction-us-female.mp3"></span>
-> * *spectacular* `/spekˈtækjəlɚ/` <span class="speak-word-inline" data-audio-us-male="/audios/us/spectacular-us-male.mp3" data-audio-us-female="/audios/us/spectacular-us-female.mp3"></span>
-> * *temperature* `/ˈtempɚətʃɚ/` <span class="speak-word-inline" data-audio-us-male="/audios/us/temperature-us-male.mp3" data-audio-us-female="/audios/us/temperature-us-female.mp3"></span>
-> * *transportation* `/ˌtrænspɚˈteɪʃən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/transportation-us-male.mp3" data-audio-us-female="/audios/us/transportation-us-female.mp3"></span>
-> * *unbelievable* `/ˌʌnbɪˈliːvəbəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/unbelievable-us-male.mp3" data-audio-us-female="/audios/us/unbelievable-us-female.mp3"></span>
-> * *understand* `/ˌʌndɚˈstænd/` <span class="speak-word-inline" data-audio-us-male="/audios/us/understand-us-male.mp3" data-audio-us-female="/audios/us/understand-us-female.mp3"></span>
-> * *understanding* `/ˌʌndɚˈstændɪŋ/` <span class="speak-word-inline" data-audio-us-male="/audios/us/understanding-us-male.mp3" data-audio-us-female="/audios/us/understanding-us-female.mp3"></span>
-> * *unforgettable* `/ˌʌnfɚˈɡet̬əbəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/unforgettable-us-male.mp3" data-audio-us-female="/audios/us/unforgettable-us-female.mp3"></span>
-> * *university* `/ˌjuːnəˈvɝːsət̬i/` <span class="speak-word-inline" data-audio-us-male="/audios/us/university-us-male.mp3" data-audio-us-female="/audios/us/university-us-female.mp3"></span>
-> * *vegetarian* `/ˌvedʒəˈteriən/` <span class="speak-word-inline" data-audio-us-male="/audios/us/vegetarian-us-male.mp3" data-audio-us-female="/audios/us/vegetarian-us-female.mp3"></span>
-> * *vocabulary* `/voʊˈkæbjəleri/` <span class="speak-word-inline" data-audio-us-male="/audios/us/vocabulary-us-male.mp3" data-audio-us-female="/audios/us/vocabulary-us-female.mp3"></span>
-> * *vulnerable* `/ˈvʌlnɚəbəl/` <span class="speak-word-inline" data-audio-us-male="/audios/us/vulnerable-us-male.mp3" data-audio-us-female="/audios/us/vulnerable-us-female.mp3"></span>
-> * *wonderfully* `/ˈwʌndɚfəli/` <span class="speak-word-inline" data-audio-us-male="/audios/us/wonderfully-us-male.mp3" data-audio-us-female="/audios/us/wonderfully-us-female.mp3"></span>
+> * *accommodate* `/əˈkɑːmədeɪt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/accommodate-us-male.mp3" data-audio-us-female="/audios/us/accommodate-us-female.mp3"></span>
+> * *anniversary* `/ˌænəˈvɝːsɚi/`<span class="speak-word-inline" data-audio-us-male="/audios/us/anniversary-us-male.mp3" data-audio-us-female="/audios/us/anniversary-us-female.mp3"></span>
+> * *anticipate* `/ænˈtɪsəpeɪt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/anticipate-us-male.mp3" data-audio-us-female="/audios/us/anticipate-us-female.mp3"></span>
+> * *appreciate* `/əˈpriːʃieɪt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/appreciate-us-male.mp3" data-audio-us-female="/audios/us/appreciate-us-female.mp3"></span>
+> * *beautiful* `/ˈbjuːt̬əfəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/beautiful-us-male.mp3" data-audio-us-female="/audios/us/beautiful-us-female.mp3"></span>
+> * *celebration* `/ˌseləˈbreɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/celebration-us-male.mp3" data-audio-us-female="/audios/us/celebration-us-female.mp3"></span>
+> * *characteristic* `/ˌkerəktəˈrɪstɪk/`<span class="speak-word-inline" data-audio-us-male="/audios/us/characteristic-us-male.mp3" data-audio-us-female="/audios/us/characteristic-us-female.mp3"></span>
+> * *communication* `/kəˌmjuːnəˈkeɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/communication-us-male.mp3" data-audio-us-female="/audios/us/communication-us-female.mp3"></span>
+> * *determination* `/dɪˌtɝːmɪˈneɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/determination-us-male.mp3" data-audio-us-female="/audios/us/determination-us-female.mp3"></span>
+> * *discovery* `/dɪˈskʌvɚi/`<span class="speak-word-inline" data-audio-us-male="/audios/us/discovery-us-male.mp3" data-audio-us-female="/audios/us/discovery-us-female.mp3"></span>
+> * *encouragement* `/ɪnˈkɝːɪdʒmənt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/encouragement-us-male.mp3" data-audio-us-female="/audios/us/encouragement-us-female.mp3"></span>
+> * *entrepreneur* `/ˌɑːntrəprəˈnɝː/`<span class="speak-word-inline" data-audio-us-male="/audios/us/entrepreneur-us-male.mp3" data-audio-us-female="/audios/us/entrepreneur-us-female.mp3"></span>
+> * *environment* `/ɪnˈvaɪrənmənt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/environment-us-male.mp3" data-audio-us-female="/audios/us/environment-us-female.mp3"></span>
+> * *exaggerate* `/ɪɡˈzædʒəreɪt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/exaggerate-us-male.mp3" data-audio-us-female="/audios/us/exaggerate-us-female.mp3"></span>
+> * *examination* `/ɪɡˌzæməˈneɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/examination-us-male.mp3" data-audio-us-female="/audios/us/examination-us-female.mp3"></span>
+> * *explanation* `/ˌekspləˈneɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/explanation-us-male.mp3" data-audio-us-female="/audios/us/explanation-us-female.mp3"></span>
+> * *fascinating* `/ˈfæsəneɪtɪŋ/`<span class="speak-word-inline" data-audio-us-male="/audios/us/fascinating-us-male.mp3" data-audio-us-female="/audios/us/fascinating-us-female.mp3"></span>
+> * *government* `/ˈɡʌvɚnmənt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/government-us-male.mp3" data-audio-us-female="/audios/us/government-us-female.mp3"></span>
+> * *hospitality* `/ˌhɑːspɪˈtælət̬i/`<span class="speak-word-inline" data-audio-us-male="/audios/us/hospitality-us-male.mp3" data-audio-us-female="/audios/us/hospitality-us-female.mp3"></span>
+> * *imagination* `/ɪˌmædʒəˈneɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/imagination-us-male.mp3" data-audio-us-female="/audios/us/imagination-us-female.mp3"></span>
+> * *impossible* `/ɪmˈpɑːsəbəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/impossible-us-male.mp3" data-audio-us-female="/audios/us/impossible-us-female.mp3"></span>
+> * *incredible* `/ɪnˈkredəbəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/incredible-us-male.mp3" data-audio-us-female="/audios/us/incredible-us-female.mp3"></span>
+> * *independent* `/ˌɪndɪˈpendənt/`<span class="speak-word-inline" data-audio-us-male="/audios/us/independent-us-male.mp3" data-audio-us-female="/audios/us/independent-us-female.mp3"></span>
+> * *information* `/ˌɪnfɚˈmeɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/information-us-male.mp3" data-audio-us-female="/audios/us/information-us-female.mp3"></span>
+> * *inspiration* `/ˌɪnspəˈreɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/inspiration-us-male.mp3" data-audio-us-female="/audios/us/inspiration-us-female.mp3"></span>
+> * *interesting* `/ˈɪntrɪstɪŋ/`<span class="speak-word-inline" data-audio-us-male="/audios/us/interesting-us-male.mp3" data-audio-us-female="/audios/us/interesting-us-female.mp3"></span>
+> * *international* `/ˌɪnt̬ɚˈnæʃənəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/international-us-male.mp3" data-audio-us-female="/audios/us/international-us-female.mp3"></span>
+> * *knowledgeable* `/ˈnɑːlɪdʒəbəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/knowledgeable-us-male.mp3" data-audio-us-female="/audios/us/knowledgeable-us-female.mp3"></span>
+> * *opportunity* `/ˌɑːpɚˈtuːnət̬i/`<span class="speak-word-inline" data-audio-us-male="/audios/us/opportunity-us-male.mp3" data-audio-us-female="/audios/us/opportunity-us-female.mp3"></span>
+> * *personality* `/ˌpɝːsənˈælət̬i/`<span class="speak-word-inline" data-audio-us-male="/audios/us/personality-us-male.mp3" data-audio-us-female="/audios/us/personality-us-female.mp3"></span>
+> * *photography* `/fəˈtɑːɡrəfi/`<span class="speak-word-inline" data-audio-us-male="/audios/us/photography-us-male.mp3" data-audio-us-female="/audios/us/photography-us-female.mp3"></span>
+> * *professional* `/prəˈfeʃənəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/professional-us-male.mp3" data-audio-us-female="/audios/us/professional-us-female.mp3"></span>
+> * *recognition* `/ˌrekəɡˈnɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/recognition-us-male.mp3" data-audio-us-female="/audios/us/recognition-us-female.mp3"></span>
+> * *rehabilitation* `/ˌriːhəˌbɪləˈteɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/rehabilitation-us-male.mp3" data-audio-us-female="/audios/us/rehabilitation-us-female.mp3"></span>
+> * *relationship* `/rɪˈleɪʃənʃɪp/`<span class="speak-word-inline" data-audio-us-male="/audios/us/relationship-us-male.mp3" data-audio-us-female="/audios/us/relationship-us-female.mp3"></span>
+> * *responsibility* `/rɪˌspɑːnsəˈbɪlət̬i/`<span class="speak-word-inline" data-audio-us-male="/audios/us/responsibility-us-male.mp3" data-audio-us-female="/audios/us/responsibility-us-female.mp3"></span>
+> * *revolutionary* `/ˌrevəˈluːʃəneri/`<span class="speak-word-inline" data-audio-us-male="/audios/us/revolutionary-us-male.mp3" data-audio-us-female="/audios/us/revolutionary-us-female.mp3"></span>
+> * *satisfaction* `/ˌsæt̬ɪsˈfækʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/satisfaction-us-male.mp3" data-audio-us-female="/audios/us/satisfaction-us-female.mp3"></span>
+> * *spectacular* `/spekˈtækjəlɚ/`<span class="speak-word-inline" data-audio-us-male="/audios/us/spectacular-us-male.mp3" data-audio-us-female="/audios/us/spectacular-us-female.mp3"></span>
+> * *temperature* `/ˈtempɚətʃɚ/`<span class="speak-word-inline" data-audio-us-male="/audios/us/temperature-us-male.mp3" data-audio-us-female="/audios/us/temperature-us-female.mp3"></span>
+> * *transportation* `/ˌtrænspɚˈteɪʃən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/transportation-us-male.mp3" data-audio-us-female="/audios/us/transportation-us-female.mp3"></span>
+> * *unbelievable* `/ˌʌnbɪˈliːvəbəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/unbelievable-us-male.mp3" data-audio-us-female="/audios/us/unbelievable-us-female.mp3"></span>
+> * *understand* `/ˌʌndɚˈstænd/`<span class="speak-word-inline" data-audio-us-male="/audios/us/understand-us-male.mp3" data-audio-us-female="/audios/us/understand-us-female.mp3"></span>
+> * *understanding* `/ˌʌndɚˈstændɪŋ/`<span class="speak-word-inline" data-audio-us-male="/audios/us/understanding-us-male.mp3" data-audio-us-female="/audios/us/understanding-us-female.mp3"></span>
+> * *unforgettable* `/ˌʌnfɚˈɡet̬əbəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/unforgettable-us-male.mp3" data-audio-us-female="/audios/us/unforgettable-us-female.mp3"></span>
+> * *university* `/ˌjuːnəˈvɝːsət̬i/`<span class="speak-word-inline" data-audio-us-male="/audios/us/university-us-male.mp3" data-audio-us-female="/audios/us/university-us-female.mp3"></span>
+> * *vegetarian* `/ˌvedʒəˈteriən/`<span class="speak-word-inline" data-audio-us-male="/audios/us/vegetarian-us-male.mp3" data-audio-us-female="/audios/us/vegetarian-us-female.mp3"></span>
+> * *vocabulary* `/voʊˈkæbjəleri/`<span class="speak-word-inline" data-audio-us-male="/audios/us/vocabulary-us-male.mp3" data-audio-us-female="/audios/us/vocabulary-us-female.mp3"></span>
+> * *vulnerable* `/ˈvʌlnɚəbəl/`<span class="speak-word-inline" data-audio-us-male="/audios/us/vulnerable-us-male.mp3" data-audio-us-female="/audios/us/vulnerable-us-female.mp3"></span>
+> * *wonderfully* `/ˈwʌndɚfəli/`<span class="speak-word-inline" data-audio-us-male="/audios/us/wonderfully-us-male.mp3" data-audio-us-female="/audios/us/wonderfully-us-female.mp3"></span>
 
 [^1]: Sound files in this page mostly come from [CEPD online edition](https://dictionary.cambridge.org/pronunciation/).