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)口舌告訴我們廻收利用對(duì)環(huán)境有什麼好処，因爲(wèi)我們?cè)缇椭懒恕?/li> 返回 preach to the converted