指关节

He cracked the joints of his fingers.

他手指关劈啪作响。

Our fingers bend at the knuckle.

我们的手指在指关处弯曲。

His arm looks like a broken compass;it's not an arm any more, but a knucklebone with a shank attached.

他的胳膊活像一只破损的指南针，早已不再是一条胳膊，却成加上一条胫骨的指关。

The most common type of joint in the human body is the diarthrodial joint -- knuckles and shoulders are examples -- in which two bones come together in a capsule.

人体中最常见的关是运动关，如指关和肩关等，关处的一个囊两根骨头结合在一起。