释义
n. 露齿笑,裂口笑 v. 露齿而笑
例句
1. I knew she was joking because she had a big grin on her face. 我知道她是在开玩笑，因为她脸上堆满笑容。 2. They grinned with pleasure when I gave them the sweets. 当我给他们糖果时，他们高兴地咧开嘴笑了。
