| 例句 |
All the moving parts of the engine must be kept well-oiled.发动机上所有的活动部件都必须上足润滑油。The keys of a piano are part of its action.琴键是钢琴活动部件之一。Lubricate all moving parts with grease.给所有活动部件加润滑油。If you take the back off this clock, you can see its/the works.如果你把钟的后盖打开，就会看到那些活动部件。These tools can also be used to monitor the condition of the moving parts within a printer.这些工具也可用来监控打印机内活动部件的状态。 |