He made short work of his lunch.

　　他三下兩下吃完午飯。

　　We must get together soon for lunch.

　　我們得馬上集合去吃午飯。

　　There is no such thing as a free lunch.

　　世上沒有免費午餐之類的好事兒。

　　Lunch is his main meal of the day.

　　午飯是他的正餐。

　　Finish your lunch, there's a good boy.

　　把午飯吃完，乖孩子。