break the ice 打破僵局；打破沉默
例句：
What we have to do now is to break the ice.
我们的当务之急是打破僵局。
The host tell a joke to his guest to break the ice.
主人为了打破僵局，给客人讲了个笑话。
Peter is so outgoing,he's always the first one to break the ice at parties.
彼得非常外向，他在聚会上总是第一个打破僵局的人。