I figure they probably had to refuel and launch from one of these bases that's right on the border.
我想他们可能要从边界上的某个基地加油然后发射。
These bases can be zeroed in by the enemy .
这些基地可能成为敌人火力之焦点。
These bases limit the basic contents and rules of modern justice.
这两类依据规定了现代公正的基本内容和基本规则。
Now the bases, and you don't need to memorize the structures of these I'm going - I'm describing the whole molecule to you in its molecular detail and then we're going to simplify it down to a version that we can talk about more easily.
现在讲碱基,你不需要记住这些结构,我将给你们详述整个分子,的结构细节,然后我们把它简化为一个模板,使我们更容易讨论
You can say a polymer of DNA, for example, is four bases long, that means it has four of these repeat units and they go in the sequence from 5' to 3' of .
打个比方,要描述一个由,四个核苷酸单位构成的寡聚DNA,就是说它由四个核苷酸单位构成,并且从5'端到3'端的顺序为
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