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1000-hours/sounds-of-american-english/3.3.2-stress.md

@@ -45,7 +45,7 @@ However, the word *individual*, which is composed of 5 syllables, would likely b
 
 ![5-syllables](/images/5-syllables.svg)
 
-英语里除了**重音**、**次重音**、**非重音**之外，还有**弱读音节**，比如被弱化成 `ə` 的 *schwa*。
+英语里除了**重音**、**次重音**、**非重音**之外，还有**弱音**，比如被弱化成 `ə` 的 *schwa*。
 
 In English, in addition to primary stress, secondary stress, and unstressed syllables, we also have weakly pronounced syllables, like the schwa (`ə`) sound that occurs when syllables are reduced.
 
@@ -54,3 +54,7 @@ In English, in addition to primary stress, secondary stress, and unstressed syll
 Let's dig deep into the word *individual*, for example, it's pronounced as `/ˌɪndəˈvɪdʒəwəl/`. If each syllable was placed equal stress, it would sound something like /ɪn-dɪ-vɪ-dʒju-əl/... Within this pronunciation, the vowel `ɪ` in the second syllable `/dɪ/` is reduced to the schwa sound, `ə`; likewise, the vowel `ju` in the fourth syllable `/dʒju/` is also reduced to `ə`, but retains the coloration of `u`. The `l` at the end of the syllable, which originally carries a slight `ə` sound, thus becomes a very light `wᵊl`...
 
 ![5-syllables-individual](/images/5-syllables-individual.svg)
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+英文的元音有长短之分。需要注意的是：当一个**短元音**构成的**音节**是**重音**的时候，该音节会自然而然读得更长一些，比如 *city* 或者 *silly* 之中的第一个重音音节 `/ˈsɪ/` —— 可能是因为 `s` 音拉得更长；再比如，*Thanks, I owe you a big one.* 这句话里的 *big* —— 可能是因为 `bɪg` 这个词（**音节**）的**音调**（pitch, [3.5.1](3.5.1-pitch)）拉高，或者干脆是 `ɪ` 这个**短元音**拉长……
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+In English, vowel sounds can vary in length. It's interesting to note that when a syllable with a short vowel sound is *stressed*, it's naturally pronounced a bit longer. For example, the first stressed syllable in words like *city* or *silly*, `/ˈsɪ/` may be extended due to the drawn-out `s` sound. Similarly, the word *big* in the sentence "*Thanks, I owe you a big one*," may be elongated because the pitch of the syllable `bɪg` is raised or simply because the short vowel `ɪ` is stretched out.