Some studies suggest people underreport their caloric intake by 30 percent or more.
某些研究也表明：人们实际上吸收的卡路里比他们认为的要多出30%或者更多。
Some people are naturally more optimistic and positive than others, and some studies suggest that, to a certain degree, our genes determine happiness.
有些人天生比其他人更热情，更积极，而且许多研究表明，在很大程度上基因决定着我们的快乐指数。
There are some obvious downsides to showing your anger in this way — some studies suggest that angry people tend to be at greater risk for heart disease.
这种以发脾气来发泄怒火的方式有一些明显的弊端——诸多研究表明，脾气火爆的人更容易得心脏病。
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