To say that they survived is just saying that they're still alive.

说他们幸存下来,是指他们还活着

youdao

There, they say, the mutation that existed in under a tenth of the population spread to nearly nine-tenths-because those with it survived far better than those without.

他们说，自此，本来存在于人口十分之一的基因突变扩展到将近十分十九——因为基因发生突变后的人更能适应新的环境。

youdao

There, they say, the mutation that existed in under a tenth of the population spread to nearly nine-tenths-because those with it survived far better than those without.

他们说，自此，本来存在于人口十分之一的基因突变扩展到将近十分十九——因为基因发生突变后的人更能适应新的环境。

youdao