释义
a. 愠怒的,沉沉不乐的,阴沉的
例句
1. She never laughed and became very sullen. 她再也没有笑过，变得郁郁寡欢。 2. Susan is sullen in the morning because she had not sleep well. 苏珊今天早上郁闷不乐，因为昨晚没睡好。