1. Meanwhile, the deadliest strains of the virus perished with their hosts as natural selection favored strains that could infect hosts but not kill them. 同时,由于自然选择更倾向于选择那些能够感染宿主但不致其死亡的病毒,这种致命病毒便随着宿主的死亡而消失。
2. The cobra is one of the world's deadliest snakes. 眼镜蛇是世界上毒性最剧烈的蛇类之一。
3. Russia is deactivating some of its deadliest missiles. 俄罗斯正在拆除其一些最具杀伤力的导弹。