They had roast lamb for lunch.是什么意思？

They had roast lamb for lunch.

他们午餐吃的是烤羊肉。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

roast

vt.& vi. 烤，烘，焙；vt. 嘲讽，挖苦；n. 烤肉，户外烧烤野餐；adj. 烤好的，烤制的；

例句
Entire roast chickens were sixty cents apiece.
烤全鸡每只60美分。

lamb

n. 羔羊，小羊，羔羊肉，<宗>耶稣；vi. 生小羊，产羊羔；

例句
It was always roast lamb and canned peas for Sunday lunch.
星期天午餐总是吃烤羔羊肉和豌豆罐头。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

lunch

n. 午餐；vt.& vi. 吃午餐，供给午餐；

例句
She was old enough to absent herself from the lunch table if she chose...
她长大了，可以自己做主不来吃午餐了。