You can make multiple--you can put three or four-- the copy gets worse and worse each time, but you've got multiple copies.

你也可以复写多份，放上三四张复写纸-,不过越往下复印的效果会越差，但终归你还是有了多份副本。

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You can't have just one copy; you have to have multiple copies.

你不是只有一份副本就够了;,你得有很多份才行。

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How did we put our gene fragments into this plasmid DNA in order to make multiple copies of it, or to clone the gene?

如何把基因片段整合到质粒DNA上,来获得大量拷贝,或者说来克隆基因呢

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