fall out

详细解释:脱落, 离队, 争吵, 结果是
【化】 落下; 脱落; 散落物; 核 * 散落物; 沉降物; 落下灰

英语解释：

名词 fall out:

the radioactive particles that settle to the ground after a nuclear explosion同义词：fallout, radioactive dust