1、The two organisms have coadapted to live in symbiosis with each other.
这两个生物体已经相互适应，能够共生共存。

2、The predator and prey have coadapted over generations, leading to a delicate balance in their ecosystem.
捕食者和猎物已经在多个世代中相互适应，导致它们的生态系统中形成了一个微妙的平衡。