“灾变”用英语怎么说？

周期性的局部地区的灾变降低了种群的数量.Periodic local catastrophes reduce populations.最著名的灾变论的对立理论就是渐变论.The most popular alternative to catastrophism is the gradualistic approach.即便当我还是个孩子的时候, 我会做核灾变的噩梦.Even as a kid, I had nightmares of n...

“灾变”的拼音为：zāi biàn...