diff --git a/1000-hours/sounds-of-american-english/2.2-consonants.md b/1000-hours/sounds-of-american-english/2.2-consonants.md
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--- a/1000-hours/sounds-of-american-english/2.2-consonants.md
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@@ -1,6 +1,6 @@
 # 2.2. 辅音（Consonants）
 
-地球上的所有语言都一样，在自然语流中，**辅音**不会单独存在。单独的**元音**，可以构成**音节**，也可以构成或者表达意义。比如，*ah* <span class="pho alt">ɑː</span>, *oh* <span class="pho alt">oʊ</span>，或者 *Uh-Oh* <span class="pho alt">ˈʌoʊ</span><span class="speak-word-inline" data-audio-us-female="/audios/us/Uh-Oh.mp3"></span>。但，绝大多数**辅音**必须依附于**元音**才能构成**音节**[^1]，并且，单独的辅音也不能构成意义。
+地球上的所有语言都一样，在自然语流中，**辅音**不会单独存在。单独的**元音**，可以构成**音节**，也可以构成或者表达意义。比如，*ah* <span class="pho alt">ɑː</span>, *oh* <span class="pho alt">oʊ</span>，或者 *Uh-Oh* <span class="pho alt">ˈʌoʊ</span><span class="speak-word-inline" data-audio-us-female="/audios/us/Uh-Oh.mp3"></span>。但，绝大多数**辅音**必须依附于**元音**才能构成**音节**，并且，单独的辅音也不能构成意义。
 
 All languages on Earth follow a similar pattern: in the flow of natural speech, consonants *never* stand alone. Isolated vowels, however, can form syllables and convey meaning. For instance, you have sounds like *ah* <span class="pho alt">ɑː</span>, *oh* <span class="pho alt">oʊ</span>, or *O'Oh* <span class="pho alt">ˈɑoʊ</span>. But consonants almost always need to be attached to vowels to form *syllables*, and alone, they don't carry meaning.