【机】axle

• 火车轴

  train axle

• 大车轴

  cart axle

• 曲柄轴

  crank axle

• 前轴

  front axle

• 机器的主轴

  main axle of a machine

【数】axis

绕东西的器物；画轴spool; scroll

• 线轴

  spool

scroll

• 墙上挂着一轴山水画。

  A landscape painting is hanging on the wall.

• 两轴线

  two spools of thread