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	flooring floor lamp floor-length floor plan floor show floortime floozy flop flophouse floppy floppy disk flora floral Florence Florentine floret florid Florida Florida Keys florin florist floss flotation flotation tank flotilla

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