1. What in the world were you smuggling in that sand?"
    你那沙中到底有什么？"

2. What were you smuggling?"
    你走私什么？"

3. The were accused of smuggling diamonds from foreign countries.
    他们因自国外走私宝石而被告发。

4. They thought he was smuggling (走私) nothing, and just playing a joke on them.
    他并没走私，只是跟他们开个玩笑而已。

5. "Not for a moment. I was smuggling all the time.
    "才不是呢，我一直在走私。