only if片语KK [ˋonli ɪf] /ˈoʊnli ɪf/发音片语1只有…才、只有在…的情况下I will sign the contract only if they lower the price.只有在他们降价的情况下,我才会签这份合约。2前提是、条件是口语You can borrow my car, only if you return it tonight.你可以借我的车,前提是今晚要还。用这个字练口说→