这些差异可以作为鸟类的分类依据。
分类依据是各类液体的闪点及其性质。
The various classifications are determined by the flash point and characteristics of the liquid.
第一级分类依据主导营力划出成因类型;
The first order is called genetic types, setting apart on the main agent.
One useful thing about separating receptors into types or families is that we found that many different receptors work by the same basic underlying mechanism.
我们将受体进行分类的一个依据,就是我们发现,很多受体有相同的作用机制
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