Earlier studies have documented half brain sleep in a wide range of birds.
早些时候的研究已经记录了种类广泛的鸟类的半脑睡眠。
Some studies have also found an impact for men, though a less noticeable one.
尽管并不引人注目，一些研究还是发现了一个对男性的影响。
Recent studies have found positive effects.
最近的研究发现了积极的效果。
Studies have found that money can, in fact, make people happier.
研究发现，金钱实际上可以让人更快乐。
Careful studies have demonstrated, however, that this is not the case.
然而，谨慎的研究表明，情况并非如此。
Studies have shown that the right and left ear process sound differently.
研究表明左耳和右耳处理声音是不同的。
Previous behavioral studies have shown that learning new information can lead to forgetting.
先前的行为研究表明，学习新信息后会导致遗忘。
But what do studies have to say?
但是，研究结果是怎样的呢？
A number of studies have shown this.
很多研究也证明了这一点。
But no studies have been done in WOMEN.
但没有对女人进行的研究。
The studies have not been made public.
研究过程并未公开。
The same studies have been done in Asia.
同样的研究也在亚洲。
A number of studies have reinforced this link.
一些研究更增强了这种联系。
That's similar to what other studies have found.
这类似于其他的研究发现。
A few previous studies have hinted at the possibility.
以前的几个研究已经暗示这种可能性。
Many studies have shown that income inequality is rising.
许多研究表明收入不平等正在扩大。
Studies have shown that marriage increases happiness.
研究显示婚姻能增加幸福感。
But plenty of other studies have shown no such relationship.
但很多其它研究显示这样的关系并不存在。
Several studies have tried to answer this with cold, hard data.
有些研究已经试图利用客观确凿的数据来回答这一问题。
So far, some studies have found damage while others have not.
目前，已有些研究发现损害出现，而有的则还没有进展。
Studies have shown this can nearly double the enrolment rate.
研究表明，这样做能够使加人人数增加一倍。
Previous studies have shown that people blink more when lying.
过去的研究证明当人们撒谎时，眨眼更频繁。
But those same studies have shown that cancer is devilishly complicated.
也正是这些研究说明癌症非常复杂。
But few studies have looked at what happens once the gas is in the ground.
但是，埋藏在地下的温室气体会发生什么变化？关于这方面的研究很少。
Many studies have shown that people with strong relationships are happier.
众多研究已经表明有良好的人际关系的人更加快乐。
Previous studies have also linked screen time with attention problems.
之前的研究也将花在屏幕前的时间与注意力问题挂钩。
Past studies have shown that infants babble better in their mother's presence.
先前的研究表明，婴儿当着母亲的面就嘟嘟得起劲。
Past studies have shown that infants babble better in their mother's presence.
先前的研究表明，婴儿当着母亲的面就嘟嘟得起劲。
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