单词：gas amplification factor
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PCRthe polymerase chain reactionis a crucial tool. The DNA amplification technique is used in genome sequencing, forensics and the diagnosis of various diseases. To give researchers more genetic material to work with, a PCR instrument repeatedly heat
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Because of course, the ear is, I mean, subject to all sorts of things. 这当然是因为，我是说，耳朵受制于很多因素。 The room we happen to be in, the amplification, the quality of the instrument,the type of sticks...etc., etc. 我们现
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