Though drones can be harmful, they can be very helpful.

尽管无人机可能有害，但它们也可能非常有用。

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Stress is more likely to be harmful if you feel helpless to deal with the problem or situation that causes the stress.

VOA: special.2009.03.24

when you want someone to, not to do something that's going to be harmful or uncomfortable or strange.

或者你不希望某人做一些有害的，令人不安的或是奇怪的行为。

Don't 课堂 - SpeakingMax英语口语达人

We know what censorship is. Censorship is the banning of books that have been published and that have been deemed by the state authorities to be dangerous or harmful in some way.

我们知道什么是控制，控制就是,禁止已经出版的书籍和被政府认为,在某些方面非常危险和有害的。

耶鲁公开课 - 弥尔顿课程节选

The goal is to identify and quantify conflicts of interest that may be harmful to pensions.

FORBES: SEC Scrutiny of Pension Consultants: A Call To Action (February 28, 2004 )

Lead is known to be harmful to many organs and the central nervous system.

BBC: US rice imports 'contain harmful levels of lead'

Over 80% of cash tested carried germs that could be harmful to people with lowered immunity.

CNN: Dirty money? Check your wallet