We must get together soon for lunch.
我们得马上集合去吃午饭。
There is no such thing as a free lunch.
世上没有免费午餐之类的好事儿。
Lunch is his main meal of the day.
午饭是他的正餐。
Finish your lunch, there's a good boy.
把午饭吃完，乖孩子。
She's having lunch with the Director, no less.
她居然在与主管一起进午餐。