21-08-19 To try to persuade people who already agree with you. 例句： The men who really need to hear the message dont come to the meetings, so Im just preaching to the choir. 真正需要听到消息的人不会来开会，所以我只是白费口舌。...

13-07-09 When people sing in a choir their heart beats are synchronised（同步） , so that the pulse of choir members tends to increase and decrease in unison（一致地） . This has been shown by a study from the Sahlgrenska Academy at University of Gothenburg...