touch sth off1.开(炮等):The meteorologist touched off a cannon towards the sky to carry out artificial precipitation and soon a downpour came down.那位气象学家向天空开炮进行人工降雨,很快大雨就倾盆而下。2.引起;触发;激起:We should be prudent when talking with others because a careless word may touch off a serious misunderstanding.在跟别人谈话时应当慎重,因为不慎重的话可能引起严重的误会。 |