水泵工况不稳定区的英文：
unstable area of pump operating condition

Is the system unstable?
是系统不稳定吗？

The sound caused by unstable oscillations on the line.
由于线路上的不稳定振荡而引起的声音。

The barrister represent to the court that the defendant is mentally unstable
讼务律师向法庭陈述被告精神不正常

This is a drainage area.
这里是排水区。

The areas of greater rainfall conform roughly with these forested areas.
降雨量较大地区大致与这些森林地区相符合。

The?penalty area?is the rectangular area in front of the goal.
禁区就是指球门前的矩形区域。

The pump is electroneutral.
此泵是电中性的。

This is an electroneutral pump.
这是一个电中性泵。

He pumped my hands.
他握着我的双手使劲地摇着。