全空间去掉原点，它是单连通的吗？

OK, so space with the origin removed, OK, you think it's simply connected?

youdao

这就是球面上，对单连通的定义。

OK, so that's the definition of the surface of a sphere being simply connected.

youdao

总之，这是关于单连通的习惯性提醒。

OK, so anyway, that's the customary warning about simply connected things.

youdao

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

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