辐射直接使DNA变异，但是我们看到的辐射光大部分是可逆的。

It mutates the DNA directly. But most of what we see seems to be reversible.

youdao

这是第一次发现基因变异使人们在受到压力时对待刺激有不同的反应。

This is the first time a genetic variation has been found that shows a different response to emotional stimuli only when individuals are stressed.

youdao

l在过程和步骤已经确定的给定系统中，一阶变化是个变异，它使系统本身相对的不变。

First-order change is a variation in the way processes and procedures have been done in a given system, leaving the system itself relatively unchanged.

youdao

All you have to do is mutate the DNA, which is very straightforward to do in molecular biology, and now you can tag absolutely any protein that you're interested in.

你所需要做的就是使DNA变异，这在分子生物学力是很容易做到的，你可以用它标记,任何你感兴趣的蛋白质。

麻省理工公开课 - 化学原理课程节选