Question

knuckle 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; third:knuckles~done:knuckled~pl:knuckles~ing:knuckling~past:knuckled~

Accepted Answer

英[ˈnʌkl]  美[ˈnʌkəl] N-COUNT指节；指关节Your knuckles are the rounded pieces of bone that form lumps on your hands where your fingers join your hands, and where your fingers bend.例：Brenda's knuckles were white as she gripped the arms of the chair.布伦达握紧椅子扶手时指关节都变白了。

单词	knuckle
音标	英[ˈnʌkl] 美[ˈnʌkəl]
解释	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;
例句	N-COUNT 指节；指关节 Your knuckles are the rounded pieces of bone that form lumps on your hands where your fingers join your hands, and where your fingers bend. 例：Brenda's knuckles were white as she gripped the arms of the chair.布伦达握紧椅子扶手时指关节都变白了。
变形	third:knuckles~done:knuckled~pl:knuckles~ing:knuckling~past:knuckled~

Knuckles Fingers 英[ˈnʌkl 美[ˈnʌkəl 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 N Count 指节；指关节 Rounded