常見例句You needn't bother telling us how recycling helps the environment, because you're preaching to the converted. 你不必費(fèi)口舌告訴我們回收利用對(duì)環(huán)境有什么好處，因?yàn)槲覀冊(cè)缇椭懒恕?/li> 返回 preach to the converted