"We eat lunch at 11 o'clock" 是一种表达方式，意思是"我们11点吃午饭"。
"Lunch" 是指"午饭"，这个词源于中世纪拉丁文"luncheon"，意思是"午饭"，在英语中常用来指中午吃的一餐。
下面是一些使用"lunch"的英文例句及其中文翻译：
I'm going to eat lunch at the café across the street. (我要去街对面的咖啡馆吃午饭。)
We usually have lunch at noon. (我们通常在中午吃午饭。)
She packed a sandwich for her lunch. (她把三明治装进午饭盒。)
Let's meet at the park for lunch. (咱们在公园见面吃午饭吧。)