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1·It is well known that deoxyribonucleic acid (DNA) is the transference base of information in the course of life. The destruction of DNA will cause the handicap of life, even discontinuity.

众所周知，生命信息传递的物质基础是脱氧核糖核酸(DNA)，DNA分子的破坏势必造成生命过程的障碍，甚至中断。

2·We have explored causes of the variation of deoxyribonucleic acid: It is probable that chemical reactions give rise to the variation or that physical interactions give rise to the variation.

我们探索脱氧核糖核酸分子变异的原因：它可能由化学反应引起；也可能由物理作用引起。而物理作用引起的变异表现得更明显。

3·It is well known that Deoxyribonucleic acid (also named DNA) is the transference base of information in the course of life. The destruction of DNA will cause the handicap of life, even discontinuity.

众所周知，生命信息传递的物质基础是脱氧核糖核酸(又称DNA)，DNA分子的破坏势必造成生命过程的障碍，甚至中断。