break the ice打破沉默；破冰

on thin ice 处在一种很有风险的境地

skatee／walk／tread on the ice 在冒险

tip of the iceberg 冰山一角

To break the ice，let us introduce ourselves to each other.

为了打破沉默，我们来互相作个自我介绍吧。

You are skating on the ice by telling it to others.

你把这个告诉别人那你就是把自己处在危险的境地之中。

Peter explained the situation to his girlfriend but it cut no ice with her.

他给女友解释了情况，但是她完全不买账。

What you see about athletes’ success is only the tip of the iceberg.

你所看到的那些运动员的成功只是冰山一角。