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方法:在桌子上放一个乒乓球,再拿一把塑料尺子在衣服上或头发上迅速地摩擦,然后再将摩擦后的尺子拿到乒乓球附近。
Method: Put a table tennis ball on the table, then use a plastic ruler to quickly rub on the clothes or on the hair, and then take the rubbed ruler to the table tennis ball.