皮尤研究中心对全国范围内具有代表性的1807名父母组成的样本进行了调查，发现课外活动反映了育儿方式的差异。

Extracurricular activities reflect the differences in child rearing in the Pew survey, which was of a nationally representative sample of 1,807 parents.

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这些暗中要求一种普遍性——在全国范围内或者在种族意义上来看——是这种生活的代表性。

These implicitly make a claim to the generality--at the national scale, or in the racial sense-- the representativeness of this life.

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为了在全国范围内竞争工作岗位，他们应该具备新兴产业所需的技能，无论这些技能是否是技术性的。

To compete for jobs on a national level, they should be armed with the skills that emerging industries need, whether technical or not.

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They're small molecules, they're lipid soluble, they can go from extracellular to intracellular.

它们是小分子,并且是脂溶性的,它们能从胞外进入胞内

耶鲁公开课 - 生物医学工程探索课程节选