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	machinist machismo macho Machu Picchu Macintosh mack Mackenzie Mountains Mackenzie River mackerel mackintosh Mackintosh, Charles Rennie MacLaine, Shirley Maclean, Alistair MacLean, Donald Macmillan, Harold MacNeil/Lehrer Report macramé macro- macro macrobiotic macrocosm macroeconomic macroeconomics macroprudential Mac the Knife

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