美国疾病控制与预防中心正在进行一项大规模研究，该研究发现，各年龄段的美国人体内都有148种化学物质。

A large, ongoing study conducted by the Centers for Disease Control and Prevention has found 148 chemicals in Americans of all ages.

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在澳大利亚维多利亚州马里伯勒进行的一项大规模研究表明，中额秃顶的患病率呈上升趋势。

One large scale study in Maryborough, Victoria, Australia showed the prevalence of mid-frontal baldness increases.

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一项大规模研究表明，睡前使用手机会损害健康。

Using a mobile phone before going to bed is bad for your health, says new study

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And so in the 1940s, a group of people led by Collier started to develop a large scale production method for making a reliable source of vaccinia virus.

在二十世纪四十年代,科利尔带领一群人开始研究,一种大规模的生产方法,这种方法能制得牛痘病毒的可靠来源

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But it's by far the largest study on women.

这是到目前为止最大规模的对女性的研究

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