This refers to the joints of a finger. It can also refer to the knee or elbow of an animal.
指人手指的关节部分，也可指动物的膝或肘。
| 单词 | knuckle |
|---|---|
| 音标 | [ˈnʌkl] [ˈnʌkəl] |
| 释义 | n.["（指人）指关节","（指动物）膝关节，肘","铰结，肘形接","铜指节套"] vt.["用指关节打、压、碰、擦"] |
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