美洲原住民明智地保护了这些宝贵的自然生物资源。

Native Americans had taken care of these precious natural resources wisely.

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如何计划一个可以改变我们的自然生物钟节律的日程安排？

How to plan a daily schedule that can alter our natural chronobiological rhythms?

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在此阶段，儿童只是个纯粹的自然生物。

For here the child is purely a physical creature.

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But the idea is to try to present to you what's exciting about Biomedical Engineering, the ways that one can take science and mathematics and apply that to improve human health.

这门课力图向你们展示,生物医学工程那激动人心之处,它融合了自然科学和数学,并用其成果提高人类健康水平

耶鲁公开课 - 生物医学工程探索课程节选

For here the child is purely a physical creature.

在此阶段,儿童只是个纯粹的自然生物

耶鲁公开课 - 心理学导论课程节选

This is one of the biological properties, the naturally occurring properties of plasmids, is that they exist in microbial populations and they confer on them resistance from toxins that would ordinarily kill them.

这就是这类生物学特性之一,它是质粒所具有的自然特性,这些质粒存在于微生物群体中,并赋予微生物抗性,使它们免于被毒素杀死

耶鲁公开课 - 生物医学工程探索课程节选