adj.闷闷不乐的，阴沉的，郁郁寡欢的，面有愠色的

After being scolded by his teacher, the usually cheerful boy became sullen and withdrawn.
被老师责骂后，平时开朗的男孩变得沉闷和孤僻。
The sky was sullen and overcast, hinting at an impending storm.
天空阴沉沉的，预示着即将来临的暴风雨。
Despite the lively party atmosphere, she remained sullen in the corner, refusing to engage with anyone.
尽管派对气氛热烈，她仍然独自坐在角落里，郁郁不乐，不愿与任何人交流。
His sullen silence during the meeting made everyone uncomfortable.
他在会议期间的沉默寡言让所有人都感到不自在。
The customer's sullen demeanor indicated that he was far from satisfied with the service.
顾客那阴沉的态度表明他对服务非常不满意。
She entered the room with a sullen expression, clearly upset about something.
她一脸阴郁地走进房间，显然因为某事而心烦意乱。
The defeated team left the field with heads hung low and faces sullen.
落败的队伍低垂着头，面带沮丧地离开了赛场。
The sullen teenager refused to explain why he had skipped school.
那个闷闷不乐的少年拒绝解释他为什么逃课。
The once vibrant town now wore a sullen look, its streets deserted after the factory closures.
曾经生机勃勃的小镇现在显得沉闷无生气，工厂关闭后街道变得空荡荡的。
His sullen resistance to change only hindered the progress of the project.
他对变革的阴沉抵抗只阻碍了项目进展。