"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.
Now Tom was motioning with his hand out, palm down flat, making a small circular motion in mid-air.
汤姆伸出手来，手心平着向下，在空中划了个小圈。
The two extra seats can fold down flat to create the space required for a "boot".
额外增加的两个座椅可以向前折叠放平以增加行李箱储物空间。
By boiling the horn and clamping it down flat, it will stay in that shape once cooled.
把角片用水煮过后用夹子夹在平板上，当冷却后它就会保持这种形状了。
By boiling the horn and clamping it down flat, it will stay in that shape once cooled.
把角片用水煮过后用夹子夹在平板上，当冷却后它就会保持这种形状了。
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