preach to the converted
基本解释
- 對已持有相同觀點的人作宣傳
英汉例句
- You needn't bother telling us how recycling helps the environment, because you're preaching to the converted. 你不必費口舌告訴我們廻收利用對環境有什麽好処,因爲我們早就知道了。
英英字典
- to try to persuade people to believe things that they already believe