水不能有效阻挡太阳中更有害的射线。
Water is not an effective shield against the sun's more harmful rays.
眼泪有助于保护眼睛去除可能有害的异物。
Tears help to protect the eye from potentially harmful foreign bodies.
然而，戴错眼镜可能是有害的。
这对我的整体健康目标是有害的。
它们把有害的空气挡在外面。
如果空气中有有害的东西，眼睛就会充满泪水。
If there is something harmful in the air, the eyes fill with tears.
别忘了这通常是误导性的信息，而且有时是有害的。
Don't forget it's often misleading information, and sometimes harmful.
就像我说过的，这是尤其有害的物质，在通风柜中才能用。
As I said, it's a particularly hazardous substance and is worked with in fume hoods.
如果空气中有一些有害的东西，眼泪会通过遮住眼睛来保护眼睛。
If there is something harmful in the air, tears protect your eyes by covering them.
然而，并不是所有的人都知道噪音也是一种污染，对人类健康也是有害的。
However, not all the people know that noise is also a kind of pollution, and that is harmful to human health, too.
在这里我看到了一个危险的陷阱：如果你经历某事在短期内感觉很好，但从长期来看实际上是有害的，那该怎么办？
I see a dangerous trap here: what if you experience something that feels very good in the short term but is actually harmful in the long term?
这让我想到研究的第三个领域，它并不能支持单性别学校教育，而且实际上表明这种做法是有害的，那就是社会发展心理学。
That brings me to the third area of research which fails to support single-sex schooling and indeed suggests the practice is actually harmful: social developmental psychology.
虽然毫无疑问，持续的压力是有害的。但有几项研究表明，在具有挑战性的情况下，如果你能够迎难而上，可能对你有好处。
While there's no question that continuous stress is harmful, several studies suggest that challenging situations in which you're able to rise to the occasion can be good for you.
即使在经济条件允许的情况下，人们能够65岁就退休，但超过30年不开发利用自己的潜能对于认知和情感的活跃是有害的。
Even if people can economically support a retirement at 65, over thirty years of potential inactivity is harmful to cognitive and emotional vitality.
你什么时候意识到它是有害的？
肮脏的空气和水是有害的。
实际上，这样做是有害的。
当然，太多的压力对我们的身心是有害的。
Of course, too much stress is harmful to our bodies and minds.
他们想证明内部脂肪对身体的传输系统是有害的。
They want to prove that inside fat does harm to the body' s communication systems.
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