英语语法分析

It is interesting that Chinese characters evolve from pictures and signs.

有趣的是，汉字是由图画和符号演变而来的。

So why would animals evolve a characteristic that seems to endanger them?

那么，为什么动物会进化出一种似乎会危及它们自身的特性呢？

Sometimes primary group relationships evolve out of secondary group relationships.

有时主要的群体关系从次要的群体关系演变而来。