第32章 Lesson 32: Healthy Muscles Matter
- 跟美国学生同步练阅读：Smart Reading（英文原版 Grade 3）
- (加)韦恩·埃弗里特
- 367字
- 2016-12-27 16:26:54
We have more than 600 muscles in our body. These muscles help us move, lift things, pump blood throu...
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We have more than 600 muscles in our body. These muscles help us move, lift things, pump blood throu...