drop out
同义词：
throw in the towel | throw in | give up | drop by the wayside | quit | chuck up the sponge | fall by the wayside |
反义词：
enter |
drop out
同义词：
throw in the towel | throw in | give up | drop by the wayside | quit | chuck up the sponge | fall by the wayside |
反义词：
enter |