稍后我们会知道，在一个单连通区域上也可以。

Or, as we will see soon, in a simply connected region.

youdao

去掉小的连通区域。

Deleting small connected area.

youdao

这两个区域不是连通的。

These two guys together are not connected.

youdao

这两个区域不是连通的。

These two guys together are not connected.

youdao