Rhythm and blues mutated into rock and roll.

节奏布鲁斯演变成为摇滚乐。

For him, it is a much nastier expression: infused with venom, and reflective of growing distrust and fear, it has mutated to refer to the poor in general.

对他来说，这是一种更严重的表达：被灌输了毒液，反映了不断增长的不信任和恐惧，它已经演变为对一般穷人的指称。

Since then it has mutated into a global crisis.

那以后，就逐渐演变成了全球性的危机。

Genes are copied, mutated and selected over and over again.

各种基因一遍又一遍地经历着复制、改变和选择的过程。