人体主要由骨、肌肉和脂肪组成。

The body is made up primarily of bone, muscle, and fat.

《柯林斯英汉双解大词典》

然后在凝胶上培育人体间质干细胞——骨骼、肌肉和其他组织类型的前体。

Then they grew human mesenchymal stem cells - the precursors of bone, muscle and many other tissue types - on the gels.

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尽管需要花力气去弯曲关节或拉伸肌肉，但人体可以利用弹簧般的肌腱和分布优雅的肌肉来回收相当部分的能量。

Although effort is required to bend a joint or flex a muscle, the body is able to recycle much of the energy expended through spring-like tendons and elegantly arranged muscles.

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