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diff --git a/1000-hours/public/jupyter-notebooks/class-us-male.mp3 b/1000-hours/public/jupyter-notebooks/class-us-male.mp3
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diff --git a/1000-hours/public/jupyter-notebooks/edge-tts-valcab-pronounciation.ipynb b/1000-hours/public/jupyter-notebooks/edge-tts-valcab-pronounciation.ipynb
index 1424877a..5d721dbc 100644
--- a/1000-hours/public/jupyter-notebooks/edge-tts-valcab-pronounciation.ipynb
+++ b/1000-hours/public/jupyter-notebooks/edge-tts-valcab-pronounciation.ipynb
@@ -197,7 +197,7 @@
},
{
"cell_type": "code",
- "execution_count": 2,
+ "execution_count": 3,
"id": "cecefa85-b37d-457e-9e99-e582dabdfb9f",
"metadata": {},
"outputs": [
@@ -216,7 +216,7 @@
"import edge_tts\n",
"import pygame\n",
"\n",
- "TEXT = \"fruitless\"\n",
+ "TEXT = \"accommodate,anniversary,anticipate,appreciate,beautiful,celebration,characteristic,communication,determination,discovery,encouragement,entrepreneur,environment,exaggerate,examination,explanation,fascinating,government,hospitality,imagination,impossible,incredible,independent,information,inspiration,interesting,international,knowledgeable,opportunity,personality,photography,professional,recognition,rehabilitation,relationship,responsibility,revolutionary,satisfaction,spectacular,temperature,transportation,unbelievable,understand,understanding,unforgettable,university,vegetarian,vocabulary,vulnerable,wonderfully\"\n",
"Wordlist = TEXT.split(\",\")\n",
"\n",
"for w in Wordlist:\n",
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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 48de0fd8..7d20e79c 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
@@ -77,4 +77,59 @@ Note, the same word, when pronounced with stress on different syllables, can cha
In the upcoming sections, we'll be covering another important aspect of stressed syllables — tone ([2.5.2](2.5.2-tone)).
+不妨逐个练习一下以下常用多音节词汇，注意**重音**、**次重音**，以及**非重音**和**弱音** `ə`（*schwa*）：
+
+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/`
+> * *anniversary* `/ˌænəˈvɝːsɚi/`
+> * *anticipate* `/ænˈtɪsəpeɪt/`
+> * *appreciate* `/əˈpriːʃieɪt/`
+> * *beautiful* `/ˈbjuːt̬əfəl/`
+> * *celebration* `/ˌseləˈbreɪʃən/`
+> * *characteristic* `/ˌkerəktəˈrɪstɪk/`
+> * *communication* `/kəˌmjuːnəˈkeɪʃən/`
+> * *determination* `/dɪˌtɝːmɪˈneɪʃən/`
+> * *discovery* `/dɪˈskʌvɚi/`
+> * *encouragement* `/ɪnˈkɝːɪdʒmənt/`
+> * *entrepreneur* `/ˌɑːntrəprəˈnɝː/`
+> * *environment* `/ɪnˈvaɪrənmənt/`
+> * *exaggerate* `/ɪɡˈzædʒəreɪt/`
+> * *examination* `/ɪɡˌzæməˈneɪʃən/`
+> * *explanation* `/ˌekspləˈneɪʃən/`
+> * *fascinating* `/ˈfæsəneɪtɪŋ/`
+> * *government* `/ˈɡʌvɚnmənt/`
+> * *hospitality* `/ˌhɑːspɪˈtælət̬i/`
+> * *imagination* `/ɪˌmædʒəˈneɪʃən/`
+> * *impossible* `/ɪmˈpɑːsəbəl/`
+> * *incredible* `/ɪnˈkredəbəl/`
+> * *independent* `/ˌɪndɪˈpendənt/`
+> * *information* `/ˌɪnfɚˈmeɪʃən/`
+> * *inspiration* `/ˌɪnspəˈreɪʃən/`
+> * *interesting* `/ˈɪntrɪstɪŋ/`
+> * *international* `/ˌɪnt̬ɚˈnæʃənəl/`
+> * *knowledgeable* `/ˈnɑːlɪdʒəbəl/`
+> * *opportunity* `/ˌɑːpɚˈtuːnət̬i/`
+> * *personality* `/ˌpɝːsənˈælət̬i/`
+> * *photography* `/fəˈtɑːɡrəfi/`
+> * *professional* `/prəˈfeʃənəl/`
+> * *recognition* `/ˌrekəɡˈnɪʃən/`
+> * *rehabilitation* `/ˌriːhəˌbɪləˈteɪʃən/`
+> * *relationship* `/rɪˈleɪʃənʃɪp/`
+> * *responsibility* `/rɪˌspɑːnsəˈbɪlət̬i/`
+> * *revolutionary* `/ˌrevəˈluːʃəneri/`
+> * *satisfaction* `/ˌsæt̬ɪsˈfækʃən/`
+> * *spectacular* `/spekˈtækjəlɚ/`
+> * *temperature* `/ˈtempɚətʃɚ/`
+> * *transportation* `/ˌtrænspɚˈteɪʃən/`
+> * *unbelievable* `/ˌʌnbɪˈliːvəbəl/`
+> * *understand* `/ˌʌndɚˈstænd/`
+> * *understanding* `/ˌʌndɚˈstændɪŋ/`
+> * *unforgettable* `/ˌʌnfɚˈɡet̬əbəl/`
+> * *university* `/ˌjuːnəˈvɝːsət̬i/`
+> * *vegetarian* `/ˌvedʒəˈteriən/`
+> * *vocabulary* `/voʊˈkæbjəleri/`
+> * *vulnerable* `/ˈvʌlnɚəbəl/`
+> * *wonderfully* `/ˈwʌndɚfəli/`
+
[^1]: Sound files in this page mostly come from [CEPD online edition](https://dictionary.cambridge.org/pronunciation/).