These plasmids occur naturally in nature; they were discovered in micro-organisms and they also confer some biological properties onto micro-organisms.
这些质粒在自然界中自然存在；它们是在微生物中发现的，它们也赋予了微生物一些生物学特性。
Some are using enzymes. Some are using micro-organisms.
有些是用酶，有些使用微生物，还有一些采取一种结合生物化学和传统化学的方法。
Some are using micro-organisms. Still others have a hybrid approach, part biotechnological and part traditional chemistry.
有的使用酶，有的使用微生物，还有的采用混合方法，部分是生物科技、部分是传统化学。
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