枢轴

1. 指南针用于确定地理方向的设备，通常包括一个或多个水平安装或悬挂的磁针，可在枢轴上自由活动直到与地球磁场在一条线上
   A device used to determine geographic direction, usually consisting of a magnetic needle or needles horizontally mounted or suspended and free to pivot until aligned with the magnetic field of Earth.
2. 活动防浪板帆船上一活动龙骨，可以绕枢轴扯起以减少船在浅水的吃水深度
   A movable keel in a sailboat that can be pivoted upward to reduce the boat's draft in shallow water.
3. 中心销连接马车或其它车辆的车身和它的前轴的垂直栓销，一般起枢轴作用
   A vertical bolt that joins the body of a wagon or other vehicle to its front axle and usually acts as a pivot.

轴的英语翻译：