Today is pretty cold.

今天挺冷的

It's a piece of cake.

这是小菜一碟。

Our troop was under his command.

我们的部队由他指挥。

He is burning the midnight oil.

他在挑灯夜读。

The bright young man can get ahead quickly in the tourist industry.

这位聪明的年轻人在旅游世界很快获得成功。

He takes offense at little things.

他为琐事生气。