1. 我們使用哪種潤(rùn)滑劑，主要取決于軸承的轉(zhuǎn)速如何。
   The sort of lubricant which we use depends largely on the running speed of the bearing.
2. 由于是固定的支承點(diǎn)，死頂尖必須潤(rùn)滑。
   The dead center, being a stationary bearing point, must be lubricated.
3. 在鉆機(jī)的金剛鉆頭旋轉(zhuǎn)的時(shí)候，泥漿便進(jìn)行了潤(rùn)滑。
   As the diamond tip of the drill revolves, it is lubricated by mud.
4. 你再不加些潤(rùn)滑油，發(fā)動(dòng)機(jī)就要卡住了。
   Your engine will seize up if you don't put some more oil in.

潤(rùn)的英語(yǔ)翻譯：

滑的英語(yǔ)翻譯：