We talked about the structure of DNA, how it works in terms of a physical chemical model of the DNA molecules.
上节课我们讲了DNA的结构,从理化模型的角度讲了,DNA分子是如何工作的
Most chemical changes, most physical changes don't happen in isolated systems.
但是大部分的化学反应,并不是发生在孤立系统中的。
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