He was tall and lean, all bone and sinew, and he looked fit.

他又高又瘦，满身骨头和肌肉，看上去很健壮。

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Collagen is the main protein of sinew, cartilage, bone and skin.

胶原是腱、软骨、骨、皮肤的主要蛋白质。

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Collagen is the main protein of sinew, cartilage, bone and skin.

胶原是腱、软骨、骨、皮肤的主要蛋白质。

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