diff --git a/1000-hours/sounds-of-american-english/3.5-prosody.md b/1000-hours/sounds-of-american-english/3.5-prosody.md
index b6f327f8..525c63d4 100644
--- a/1000-hours/sounds-of-american-english/3.5-prosody.md
+++ b/1000-hours/sounds-of-american-english/3.5-prosody.md
@@ -16,7 +16,7 @@ The prosody of speech is like the rhythm of a song. To make our speech or singin
 > * *tone* refers to the tone of voice, whether it's *rising*, *flat*, *falling*, or *light*.
 > * **轻重**（*stress*）落实到**音节**（就好像歌曲中的**音符**）上来看，就是轻重的安排，重音、次重音、非重音、弱音（[3.3.2](3.3.2-stress)）。
 > * *Stress* refers to the emphasis placed on a syllable, similar to the emphasis on a note in a song. There are various levels of stress such as *primary stress*, *secondary stress*, *unstressed*, and *weak schwa* ([3.3.2](3.3.2-stress)).
-> * **缓急**（*rhythm*）就是一组**音节**发声的速度 —— 在歌曲中，如果 4 个音符在同一个节拍里唱完，每个音符只占 $\frac{1}{4}$ 拍，那就每个音节都**很短**且**很快**；或者反过来，如果一个音符竟然持续了 2 个节拍，那就是这个音节**很长**，但**很慢**。
+> * **缓急**（*rhythm*）由一组**音节**发声的速度构成 —— 在歌曲中，如果 4 个音符在同一个节拍里唱完，每个音符只占 $\frac{1}{4}$ 拍，那就每个音节都**很短**且**很快**；或者反过来，如果一个音符竟然持续了 2 个节拍，那就是这个音节**很长**，但**很慢**。
 > * *rhythm* is the speed at which a group of syllables is spoken. In a song, if four notes are sung in one beat, each note lasts a quarter of a beat, making each syllable short and fast. Conversely, if a single note spans two beats, the syllable is long and slow.
 
 所以，**好好说话**，**说得连贯**，甚至**说得好听**，更重要的是**学会如何安排好每一个音节**，而所谓的 “安排好”，就是处理**高低、起伏、轻重、缓急**以及**停顿**。