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	Soros, George sorrel Sorrento sorrow sorrowful sorrowfully sorry sort sorted sortie sorting office sort-out SOS so-so sot Sotheby's sotto voce sou soubriquet soufflé sought sought-after souk soul soul-destroying

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