smile at
1．direct a smile towards对…微笑
It often prevents an argument if you smile at people who are rude to you．朝那些对你无礼的人微笑，就可以避免争吵。
She is smiling at me．她在向我微笑。
2．be amused by对…觉得好笑；被…逗笑
The teacher smiled at my answer．老师对我的回答笑了笑。
Mary smiled at John's menace．玛丽对约翰的威胁一笑置之。