润滑

1. 我们使用哪种润滑剂，主要取决于轴承的转速如何。
   The sort of lubricant which we use depends largely on the running speed of the bearing.
2. 由于是固定的支承点，死顶尖必须润滑。
   The dead center, being a stationary bearing point, must be lubricated.
3. 在钻机的金刚钻头旋转的时候，泥浆便进行了润滑。
   As the diamond tip of the drill revolves, it is lubricated by mud.
4. 你再不加些润滑油，发动机就要卡住了。
   Your engine will seize up if you don't put some more oil in.

润的英语翻译：

滑的英语翻译：