a smug grin洋洋得意的笑
She deserved her promotion, but I wish she wasn't so smug about it.她应该得到晋升,但我希望她对此不要那么沾沾自喜。
There was a hint of smug self-satisfaction in her voice.她的言语中流露出一丝自鸣得意。
He's been unbearably smug since he gave up smoking.他戒烟之后,那个得意劲儿简直让人难以忍受。