The dogs are trained to sniff out drugs.

这些狗是经过训练的嗅毒犬。

I can sniff out secret.

我能闻出秘密。

A few groups even trained dogs to sniff out the goods.

一些群体甚至训练狗去寻找食物。

I bet my broker could sniff out some good ones for you.

我相信我的股票经纪人会帮我找出一些好股票。