•I've got an itchy rash all over my chest.我胸部出满了疹子，痒得要命。

•He came out/up in a rash after he fell in a patch of nettles.他摔倒在一片荨麻地里，结果身上就起了疹子。

•If you stay in the sun too long you'll get (a) heat rash.如果你在阳光下呆得太久，就会生痱子。

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•There has been a rash of robberies/accidents/complaints in the last two months.过去两个月中，突然发生很多起抢劫案／一下出了很多宗事故／接二连三收到多宗投诉。

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•That was a rash decision - you didn't think about the costs involved.那个决定太轻率了——你没有考虑到这样做的代价。

•[+ to infinitive] I think it was a bit rash of them to get married when they'd only known each other for a few weeks.我觉得他们刚认识几周就结婚有些草率。