润滑的英文：
smooth

参考例句：

flood lubrication
溢流式润滑

lubrication system of internal combustion engine
内燃机润滑系统

In drilling an oil well, mud is used to lubricate the cutting bit.
钻油井时，泥浆被用来润滑钻头。

Once a satisfactory system of lubrication has been secured the hardness of the interacting elements becomes critical.
一旦获得了满意的润滑系统，相互作用的元件的硬度就成为紧要之事。

The fire-brigade was called and two firemen freed George using a special type of grease.
有人打电话叫来消防队，两位消防队员使用了一种特殊的润滑调剂才使乔治得以解脱。

The uncoiler is driven by DC motor through gearbox and equipped with hydraulic and lubricating system.
开卷机由Z4型直流电机通过齿轮箱传动,配有液压系统和润滑系统。

The seed of flax,the source of linseed oil and emollient medicinal preparations.
亚麻籽用于制亚麻油和配制药用润滑膏的亚麻种子

Hydrodynamic theory of fluid lubrication
流体润滑的流体动力学理论

Mineral oils are used to lubricate machinery.
矿物油被用来润滑机器。

Centralized lubrication with hand pump.
带手动泵的集中润滑

smooth是什么意思：
adj. 平坦的，平稳的，八面玲珑的
v. 使平坦，（将软物质）均匀涂抹于

smoothing power
修匀功效

In smooth water
进入顺境

This is a smooth wine.
这是一种醇和的葡萄酒。

Smooth water runs deep
大智若愚

It has an orange flavor and smooth texture.
它有一种桔子的味道，质地光滑。