This crisis might last for a long period of time.

此次危机可能会持续很长一段时间。

《柯林斯英汉双解大词典》

Be sure to do some eye exercises to relax your eyes after you study for a long period of time.

在长时间学习后，一定要做眼保健操来放松眼睛。

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Smoking a lot of cigarettes can harm and even kill over a long period of time.

长期大量吸烟会危害身体健康，甚至导致死亡。

youdao

Medical experts say small amounts of carbon monoxide over a long period of time can greatly harm an unborn baby.

VOA: special.2010.02.02

Clearly, important information is to be conveyed to students from people who settle in the fields for a long period of time.

显然，对某个领域,进行长时间研究的学者,会将重要的信息,传达给学生。

麻省理工公开课 - 媒体、教育、市场课程节选

or if it's over a long period of time and it's an ongoing situation that you want to get rid of.

或者是一件持续了很久的事，你特别想摆脱它。

I'm afraid of 课堂 - SpeakingMax英语口语达人

My severe highs and lows that spanned a long period of time were all red flags.

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And there are ways to spread that out over a long period of time.

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Children are most vulnerable in areas where conflicts have raged over a long period of time.

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