They haven't had a square meal for four or five days.

他们已经四五天没吃上一顿像样的饭了。

He looks as though he hasn't had a square meal for weeks.

看他那样子，就好像几个星期没吃过一顿像样的饭了。

The troops are very tired. They haven't had a square meal for four or five days.

这些部队非常疲惫。他们已经四五天没有丰盛食物了。

We haven't had a square meal for a week.

一周来我们没有吃过一顿正经饭…

You'll feel better after you've had a square meal.

好好吃顿饭，你会感觉好一点。