1、It's original meaning
nut 坚果
supermarket 超市
walnut 核桃
peanut 花生
chestnut 栗子
almond 杏仁
hazel nut 楱子
pistachio 开心果
2、implicit meaning
nut 疯子,怪人
He is a real nut.
nut 对某事狂热的人
My family is full of nuts.
3、the nut in toolbox
nutcracker 胡桃夹子
meat 果肉
nut 螺母
bolt 螺钉
nuts and bolts 具体细节
Let's get down to the nuts and holts of how we to do this job.(有问题)
4、dialy language
nut 难对付的人或事物
It's a hard nut to crack.
a piece of cake 小菜一碟
be nuts about 对...发狂、着迷
It only coasts peanuts.便宜
He is nuts.他真是疯了。