但作为一个群体，他们是出生体重偏低的风险人群，这关联到日后生活中的肥胖、高血压及2型糖尿病罹患率。

But as a group they're at a higher risk for low birth weight, which is associated with obesity, hypertension and type 2 diabetes later in life.

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但，目前，尚未弄清楚养宠物的人作为一个群体，是否比其他人更加健康。

But whether pet owners as a group are a healthier lot has been unclear.

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但作为一个思想实验，它强调了升级低技能和中等技术工人群体所涉及的一些问题。

But as a thought experiment it highlights some of the problems involved in upgrading the stock of low-skilled and mid-skilled workers.

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