n cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors
v to wash or wipe with or as if with a mop
v make a sad face and thrust out one's lower lip
abbr. millions of operations per second 百万次运算/秒
n. （擦地板用的）拖把( mop的名词复数 ); 蓬乱的头发; 洗碗刷