| 释义 |
〔boss〕An enlarged part of a shaft to which another shaft is coupled or to which a wheel or gear is keyed.轮毂：一轴与另一轴耦合处或一轴与机轮或齿轮楔合处的增大部分〔wheel〕A solid disk or a rigid circular ring connected by spokes to a hub, designed to turn around an axle passed through the center.轮子：由辐条连于轮毂之上的实心圆盘或坚硬的圆环，被设计用以围绕穿过其中心的轴旋转〔hubcap〕A round covering over the hub of the wheel of a motor vehicle.毂盖：机动车轮毂上的圆盖 |