| 例句 |
wake-up callnoun something that tells of approaching danger or riskhis high blood pressure was a wake-up call that he needed to do something about his health caution, red flag, red light, tip-off, tocsin, warning omen, portent, premonition, presagenotice, notificationbuoy, indicator, knell, sign, signalforetaste, foretokenannouncement, declaration handwriting on the wall all clear in 1974 |