An arrow consists of a shaft with head (point), nock, fletching and, if desired, cresting.
一包括有头杆、尾、羽,加上饰。
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The central part of the feather became a hardened structure called a rachis, with lots of little barbs and barbules, creating the vanes of the feather.
羽央部分变成了一种为羽轴硬化结构,有许多小钩状物和钩状小枝,形成了羽羽片。
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