| 例句 |
tip-offnoun something that tells of approaching danger or riskthe retreat of the island's wildlife to higher ground was a tip-off that a tsunami was about to strike caution, red flag, red light, tocsin, wake-up call, warning omen, portent, premonition, presagenotice, notificationbuoy, indicator, knell, sign, signalforetaste, foretokenannouncement, declaration handwriting on the wall all clear in 1901 |