have a date: 有约会
I will have a date with Jenny tonight.
今晚我与詹妮有约会。

at peace: 处于和平(或和睦)状态
Dreaming of a world at peace.
梦想有和平的世界
It is better to be at peace with your rivals at the party.
在聚会上，你最好同你的对手和睦相处。

hold on: 等一等
Hold on,please. I'll see if he's in his office.
请别挂断，我去看看他是否在办公室。
Hold on a minute while I get my breath back.
停一停, 让我喘口气。