氨基酸中一种可变的化学基团。

The variable chemical group in an amino acid.

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甲基是一个化学基团。

Benzyls are chemical atomic groups.

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由氮原子与两个氢原子结合形成的化学基团。

A chemical group comprising nitrogen bound to two hydrogen atoms.

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So my goal today is to talk about sort of the basics of the molecules, their chemistry, the function of DNA in cells, sort of basic - the basic side of that.

所以我今天的任务是告诉你们,DNA分子的各种基团,它们的化学结构,细胞内DNA分子的功能

耶鲁公开课 - 生物医学工程探索课程节选