Crocs have changed considerably during their evolutionary history .

鳄鱼在进化史上有显著地变化。

Becoming an " extra-terrestrial " civilization is an inevitable evolutionary watershed of technological societies .

成为一个“外星人”文明是社会进化的必然技术分水岭。

But they do speak of change , albeit in an evolutionary way .

但是他们确乎提到了改变，尽管是以一种渐进的方式。

A unity government could take the country along an evolutionary path towards democracy , pluralism and tolerance .

只有政府团结，国家才能朝着向民主、多元、宽容的发展的道路前进。

And from these options , an evolutionary process continually prunes its choices to create ever greater order .

同时，从这些选择中，某一发展过程逐渐地去伪存真以创造更好的序。