指关节

He cracked the joints of his fingers.

他把手指关节弄得劈啪作响。

Our fingers bend at the knuckle.

我们的手指在指关节处弯曲。

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

他的活像只破损的指南针，早已不再是，成加胫骨的指关节。

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.

人体中最常见的关节是运动关节，如指关节和肩关节等，关节处的个囊状物把两根骨头结合在起。