近侧腕骨
Proximal carpal bone
以上为机器翻译结果,长、整句建议使用 人工翻译 。
近鸟龙的腕骨呈深楔形,因此它可以将前肢折叠到身体两侧,行走时前肢上的羽毛可以悬空,不会拖在地面上。
Anchiornis's wrist bone was so wedge-shaped that it could fold its arms to its sides, keeping its arm feathers off the ground as it walked.
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