shaft bunton

例句：

1. 1. The machine's shaftis worn out.
   这台机器的轴磨损了。
2. 2. The engineer used a new bearing toreplace the old one.
   工程师用一个新的轴承来替换旧的。
3. 3. The shaft of the drillis too short for this job.
   钻头的轴太短，不适合这项工作。