She gathered studies that showed the harmful effects of DDT, including declining bird populations and increased human cancers.

VOA: special.2010.03.14

So let's ask ourselves, are there any interaction effects when we talk about the human condition ? that it's life followed by death?"

所以让我们问问自己，当我们讨论,生后即是死的人类处境时,有没有相互影响“

耶鲁公开课 - 死亡课程节选

The negative combination effects that I was talking about are certainly there, but on balance I think the human condition for must of us is a good one.

我所说的负面组合影响是肯定有的，但我认为人类的处境对大部分人来说是好的。

耶鲁公开课 - 死亡课程节选

The scientists on Antarctica know better than anyone about the effects of pollution and human behavior on this important treasure of a continent.

VOA: special.2009.06.03

On the one hand, the optimists might say, "Even when we throw in the extra interaction effects, even the negative interaction effects, the overall nature of the human condition is positive.

一方面，乐观主义者可能说，“就算我们把另外的相互影响，就算把负面的相互影响算进去，人类处境的总体本质还是积极的。

耶鲁公开课 - 死亡课程节选

Different scientists have studied the effects of extreme conditions on the human mind and body.

VOA: special.2010.02.24

This week,we will tell about stress and its effects on human health.

VOA: special.2009.03.24