这世界真小~用英文怎么说？

kan ni xiang yao zen me biao da....
What a small world! (use when you meet a friend who you never thought that you will meet)
It's a small world. (use when you are chatting with people)

It's a small world!
这世界真小啊！

The world is but a little place。
这世界真小。

WHAT A SMALL WORLD! 可以，不用用问号
或者 it's such a small world!

Small world！

It's a small world!

What a small world！

maybe you can say:world comes smaller.
you can see the word in America movies.

it's such a small world