肌肉是有弹性、可伸缩的。它们一般是靠二块骨头毗连并带动骨头勾当。

Muscles are rubbery and stretchy. They are often attached across two bones and help the bones move.

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肌肉是有弹性、可伸缩的。它们一般是靠二块骨头毗连并带动骨头勾当。

Muscles are rubbery and stretchy. They are often attached across two bones and help the bones move.

youdao