研究也已经表明二十几岁的超重的人在他们的日常生活中医疗上花费的要明显更多。
Studies have shown that overweight twenty-somethings spend significantly more on medical bills over the course of their lives.
研究已经表明，香烟不仅仅会导致吸烟者患肺癌和其他可致命的疾病，同样也会危害本身不吸烟却被动吸入了烟的人。
Cigarettes cause lung cancer and other deadly illnesses not only in smokers, but also in nonsmokers who breathe in smoke, studies have shown.
他们指出，以往对人类行为的研究已经表明，社会关系孤立的人更容易受到高血压和睡眠失调的侵扰，而且他们伤口愈合的时间也更长。
They note that previous research in humans has shown that socially isolated people suffer more from high blood pressure and sleep disorders and have longer wound-healing times.
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