•Three minutes after the fire started, the house was full of lethal fumes.起火三分钟后，房子里充满了致命的毒气。

•In the car the police found guns, knives and other lethal weapons (= weapons which can kill).员警在车里找到了枪支、刀具及其他一些凶器。

•A 59-year-old man was executed by lethal injection (= by having a poisonous substance put into his body) this morning.今晨一位59岁的男性罪犯被执行注射死刑。

•informal That combination of tiredness and alcohol is lethal (= has a very bad effect).身体的疲劳加上酒精的作用会产生非常严重的后果。