基本解释[经济学]下降旗形英汉例句双语例句"Flap" sounds like something (a flag, a sail) flapping, and "flop" is the dull sound of something falling down flat.而flop听着就象什么东西直直落地发出的沉闷一响.词组短语短语Flag in falling trend 下跌旗形专业释义经济学下降旗形