Definition: a big smile Level: C2
他脸上露出淘气的笑容。
He had a mischievous ___grin on his face.
孩子们用快乐的笑容迎接我们。
The children greeted us with happy ___grins.
她的笑容很有感染力，让每个人都笑了。
Her ___grin was infectious, making everyone smile.
