成语:自相矛盾颠覆:他相矛盾在一个卖各种兵器的繁华市场上,有左右两家卖矛与盾的店铺。左侧一家质量优异,而右侧一家则因偷工减料、质地粗糙而生意萧条,但老板却总是想方设法开展不正当竞争。 Idioms: Self-contradictory subversion: he contradicts in a bustling market selling all kinds of weapons, there are about two shops selling spears and shields. The one on the left has excellent quality, while the one on the right has a business slump due to jerry-building and rough texture, but the boss always tries to unfair competition.