Teachers report that children are less irritable during the afternoon.老师们报告称, 儿童在下午不那么容易发脾气。

The kids were getting very tired and irritable so they kept crying.孩子们越来越疲惫烦躁, 所以哭个不停。

He had missed his dinner, and grew irritable.他没吃上晚餐, 变得很焦躁。