grin
单词辨析：
普通用词，通常指因开心、愉快等而嘴角上扬、面带笑容。
The baby began to smile.
婴儿开始微笑了。
She smiled at him sweetly.
她冲他甜甜地微笑。
The winner was smiling broadly.
获胜者开怀大笑。
指低声轻笑或暗自发笑。
He chuckled and picked up his glass for another sip.
他轻声笑了起来，又拿起酒杯喝了一口。
He chuckled while reading the funny story.
他一面读着滑稽小说，一面暗自发笑。
What are you chuckling about?
你在偷笑什么？
指因觉得好笑、尴尬或紧张而傻傻地笑。
The girls were giggling when John passed by.
约翰走过时，姑娘们傻笑了起来。
The funny story made her giggle.
那个有趣的故事使她咯咯地笑了起来。
指在高兴等时咧嘴、露齿而笑。
The joke made him grin from ear to ear.
这则笑话逗得他笑得合不拢嘴。
He grinned happily.
他快乐地咧着嘴笑。
通常指因认为某事有趣而出声大笑。
The pupils are jumping and laughing in the playground.
学生们在操场上又跳又笑。
She laughed a hearty laugh while listening to Mike's jokes.
听着迈克的笑话，她开怀地笑着。
指不出声地偷笑，含讽刺、不尊重之意。
What are you sniggering at? It's a serious affair.
你偷笑什么？这是一件严肃的事。
I felt that I had been insulted and sniggered at.
我觉得我受到了侮辱和讥笑。
相关例句：
He gave her a wolfish grin.
他色眼贪婪地对她笑了一下。
An enormous grin spread across his face
他咧着大嘴笑了。
Emily turned and threw her a suggestive grin.
埃米莉转过头，冲她意味深长地一笑。
The smile broadened to a grin.
笑容变得更加灿烂。
His face broke into a wide grin.
他脸上绽放出灿烂的笑容。
She came out of his office with a big grin on her face
她笑容满面地走出他的办公室。