劍橋詞典the phone number used in the UK to call the emergency services 999 （英國的緊急求救電話號碼） a hoax 999 call 打999報假案或搞惡作劇 There's been an accident - dial 999 and ask for an ambulance . 發(fā)生事故了， 快撥999叫救護車。 返回 999