同学你好，该知识点来自沪江网校《新概念英语1、2、3、4册连读【年中特惠班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
smile 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。

chuckle 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。

giggle 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。

grin 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。

laugh 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。

snigger 指不出声地偷笑，含讽刺、不尊重之意。
I felt that I had been insulted and sniggered at.
我觉得我受到了侮辱和讥笑。


祝同学学习进步~