查尔斯·达尔文是第一个描述自然选择在物种形成中的作用的人，他描写了物种形成的机制。
Charles Darwin, the first to describe the role of natural selection in speciation, wrote about the mechanisms of speciation.
第一个机制仅仅涉及到在制品的数量，而第二个则涉及到流程——流程的方向和速度。
The first mechanism only refers to the amount of WIP, but this second refers to the flow, its direction and speed.
第一，他们含有针对分析物的特定的识别机制，比如，抗体或酶。
First, they contain certain recognition mechanisms specified to the analyte, for example, antibodies or enzymes.
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