Evidence shows that extended periods of cortisol in the body weakens bones, damages nerve cells in the brain and weakens the body's defense system against disease.

VOA: special.2009.03.24

I wish it didn't say "exit," but it does say "exit," because that kind of weakens my point, but over many auditorium doors a red light just hangs there.

如果这些灯上没有注明出口就好了“,因为这样会削弱我要证明的观点，礼堂的门上一般会挂着一盏红灯。

耶鲁公开课 - 文学理论导论课程节选

Second, it shows that it-- it weakens to some extent how much faith we can have in studies that link diet to health because of this error that gets introduced.

第二,表明了这在某种程度上消弱了,我们在研究饮食与健康之间联系时的信心,因为误差的出现

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

For many years, researchers have studied why the space environment weakens bones.

VOA: special.2009.03.10

It weakens the body's natural defense system against disease.

VOA: special.2009.09.08

Alzheimers weakens or destroys memory and reasoning.

VOA: special.2010.03.09

Analysts say the biggest problem is high unemployment, which weakens demand and makes banks reluctant to lend.

VOA: standard.2009.12.20

In South Africa the virus, which weakens the immune system, is transmitted primarily through unsafe sex.

VOA: standard.2010.04.26

According to two men who are working to counter Islamic militants, the death of Noordin Top last week seriously weakens the country's terrorist network.

VOA: standard.2009.09.21