On atavism the Machine can have no mercy.

对于返祖现象，大机器绝不会有所怜悯的。

In other words, metamorphosis in mole salamanders is an atavism.

话说，鼹鼠蝾螈的变形就是返祖。

The atavism passed and he walked the room still, stopping from time to time to look at the telegram.

返祖现象过去了， 仍然在房间里走着， 不时停下来看看电报。

If for any reason this does not happen, the ancestral feature may not disappear, leading to an atavism.

如果因为因这种现象没有发生，这种祖先的特征就可能不会消失，产生返祖。

We sometimes call it an atavism, and that term is usually used for something that has missed a few generations or something that pops up due to an interesting recombination of genes.

我们有时称之为返祖现象，该术语通常用于指错过几代的东西或由于有趣的基因重组而弹出的东西。