adj.不快乐的，忧郁的

She smiled mirthlessly at his joke, not finding it funny at all.
她对他的笑话毫无笑意地笑了笑，觉得一点也不好笑。
The clown's painted smile was mirthless and eerie.
小丑的脸谱笑容空洞而诡异。
He gave her a mirthless nod in response to her greeting.
对于她的问候，他只是无趣地点了点头回应。
His laughter had become mirthless after the loss of his job.
失业后，他的笑声变得索然无味。
The politician's smile during the debate seemed mirthless and insincere.
在辩论中，这位政治家的笑容显得毫无乐趣且不真诚。
Despite the good news, she couldn't muster up a mirthful response.
尽管有好消息，她还是无法露出开心的反应。
The children played mirthlessly as they mourned their lost pet.
孩子们在哀悼失去的宠物时，玩得毫无乐趣。
The old man's eyes were devoid of mirth, reflecting a life of hardship.
老人的眼睛里没有一丝欢乐，反映出一生的艰辛。
Her laugh was mirthless, more like a bitter chuckle than anything else.
她的笑声并不愉快，更像是一种苦涩的轻笑。
The comedian's routine fell flat with the audience, who responded with mirthless silence.
相声演员的表演并未赢得观众的欢笑，反而得到了无声的、毫无趣味的沉默。