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关注:1
2013-05-23 12:21
求翻译:In a healthy knee, the surfaces of the thigh and shin bones are smooth so they can roll, rotate, and glide over each other. Cartilage is a sponge-like substance which covers the bones evenly, allowing smooth movement.是什么意思? 待解决
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- 离问题结束还有
In a healthy knee, the surfaces of the thigh and shin bones are smooth so they can roll, rotate, and glide over each other. Cartilage is a sponge-like substance which covers the bones evenly, allowing smooth movement.
问题补充: |
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