"knuckles" in Chinese (Simplified)
指关节
Definition
指关节是手指上的关节，尤其是在握拳时能看到和感觉到的部分。
Usage Notes (Chinese (Simplified))
'Knuckles' 通常指握拳时手指突出的四个关节。常见短语有 'crack your knuckles'（掰手指关节发响），'bare knuckles'（赤手空拳，常指没有戴手套打架）。
Examples
He hit the table with his knuckles.
他用**指关节**敲桌子。
She cracked her knuckles during the meeting.
她在会议中掰了掰**指关节**。
Your knuckles will hurt if you punch the wall.
如果你打墙，你的**指关节**会疼。
I always crack my knuckles when I'm nervous.
我紧张时总会掰**指关节**。
His knuckles turned white from gripping the steering wheel so tightly.
他紧握方向盘，**指关节**都变白了。
He gave me a playful tap with his knuckles on my arm.
他用**指关节**在我手臂上开玩笑地敲了一下。