单词	red flag
释义	red flagˌred ˈflag noun [countable] Examples EXAMPLES FROM THE CORPUS All we needed was a red flag to warn the locals that we might be about to frighten the horses. It was a red flag, a symbol of an anti-education attitude. Volcanologists now recognize these oscillations as a red flag that a volcano is entering a dangerous phase. American English something that shows or warns you that something might be wrong, illegal etc
随便看	omission omit omni- omnibus omnipotence omnipotent omnipresence omnipresent omniscience omniscient omnishambles omnivore omnivorous on on-air Onassis, Aristotle Onassis, Jackie on-board once Once in Royal David's City once-over oncologist oncology oncoming Ondaatje, Michael

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