Purifying it involved a clever trick using enzymes that can identify and destroy the genetic material of micro-organisms without also destroying too much of the DNA of interest.

有一个巧妙的方法来纯化dna，用一种酶能够辨别和摧毁微生物有机体的遗传物质而不会销毁太多相关的DNA。

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Sweater, knitted material of this kind of clothes, if the direct use of iron to burn tissue destroying elasticity, the steam electric iron spray in folds.

毛衣，针织质料这一类的衣服，如果直接用熨斗去烫会破坏组织的弹性，这时候最好用蒸气熨斗喷在皱褶处。

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If the component or material breaks down, all the voltage would be applied to the ammeter's input, possibly destroying it.

如果元件或材料发生击穿，全部电压都会加到安培计的输入端，从而可能将其损坏。

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