什么头微利

任何事情都没有四个字的词。什么是习语的“薄利”？小便宜是什么意思？韦唯后面应该填哪四个字？我不知道什么是好，什么是坏，四字成语:whatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatswhatsswhatsswhatsswhatssssssssssssssssssssss我谨慎，谨慎，谨慎，具体...