1.begin to 开始

As the domestic market becomes saturated, firms begin to export the product.
由于国内市场饱和，各公司开始外销。

You can't begin to imagine how much that saddens me.
你都无从想象这让我有多悲伤。

2.laugh with 面带笑容

Michael made us all laugh with his zany tricks.
迈克尔玩儿弄各种可笑的把戏把我们都逗笑了。

He was falsely jovial, with his booming, mirthless laugh.
他低声苦笑了几声，装出快乐的样子。