and then (and in addition)而且；并且；此外
We have a lot of studying to do, and then we have our work too.
(introducing a new topic)(和now、well、okay 等连用, 引出新话题或新观点)
Now then, what’s wrong?Well then, I’ll put the kettle on.
This, then, is what you must do.
and ˈthen some (informal) used to emphasize the large amount or number of sth, and to say that you have not mentioned everything 等等
There are Indian, Chinese, Mexican, Thai restaurants … and then some!
有印度、中国、墨西哥、泰国餐馆 … ，而且还有很多其他国家的餐馆！
but ˈthen | then aˈgain | but then aˈgain (informal) used to introduce additional information or information that contrasts with sth that has just been said （引出另外情况或相对照的情况）不过，可是话又说回来了
She was early, but then again, she always is. ‘So you might accept their offer?’ ‘Yes, then again I might not.’