汽蚀是大型给水泵经常出现的问题。

The feedwater pumps are often faced with cavitation.

youdao

喘振是大型轴流可调式引风机经常出现的问题。

Surge is a frequent problem in large axial flow adjustable suction fan.

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大学的英语课堂上经常出现的问题行为有其独特性。

The problem behaviors in the English class of universities have their own characteristics.

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That little semi-religious speech about modeling, I think economists, those of you who are Economics majors you're thinking, yeah, what's the problem?

有一条关于建模的准教训,对于经济学者,你们那些主修经济学的,应该经常问自己,出现什么问题了

耶鲁公开课 - 博弈论课程节选