to preach to the choir
01
劝说本来就同意的人, 对早已赞同的人讲道理
to attempt to make people accept ideas, opinions, etc. that they already agree with
Dialect
American
American习语
非正式
例子
The political candidate's speech at the rally was well-received, but some argued that it was preaching to the converted since the attendees already supported their campaign.
你不用说服我们回收很重要；你是在劝说本来就同意的人。
