The results of a growing number of studies suggest that even a modest vitamin shortfall can be harmful to your health.

越来越多的研究结果表明，即使是轻微的维生素缺乏也会对健康有害。

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Yet appearances can deceive, ecologists caution, and many of these exotics may be considered acceptable only because no one has documented their harmful effects.

然而，生态学家警告说，这些表象可能并不是真的；而且，这些外来物种中有许多可能被认为是可接受的，只是因为没有人记载过它们的有害影响。

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Attracting numbers of birds continually to the same spot can be harmful to them, particularly species that pick food from the ground contaminated by the droppings of other birds.

持续吸引大量的鸟类到同一地点对它们来说是有害的，尤其是那些在被其他鸟类粪便污染的土地上觅食的鸟类。

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The experts also noted that taking too much of some vitamins can be harmful.

VOA: special.2009.04.21

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

And also, it's useful because harmful stimuli are noticed but when something has shown itself to be part of the environment you don't notice it anymore.

而且它还是非常有用的,因为危险刺激会吸引到你的注意,但当某物被视为环境的一部分时,你便不会再去注意到该物体。

耶鲁公开课 - 心理学导论课程节选

She says she was told waiting too long might be harmful because of the baby's large size.

WSJ: Push to Reduce Rates of Early Term Induced Deliveries

Indeed, more than that I would go so far as to say that suggesting that short-term profit should be the motive of these companies would be exceptionally harmful to the cause of integrating the public and private sectors.

FORBES: To Whom Do I Owe a Duty of Care?

Station managers would not wish to push it much higher because that would take it closer to known debris fields and more of the space radiation that can be harmful to the health of astronauts.

BBC: International Space Station in debris scare