nuclear winter

1. N-UNCOUNT Nuclear winter refers to the possible effects on the environment of a war in which large numbers of nuclear weapons are used. It is thought that there would be very low temperatures and very little light during a nuclear winter. 核冬天; 大量使用核武器的核战争对环境可能造成的影响。; 据称在核冬天中气温很低，且很少见光。[also 'a' N]