1：Using A makes it possible to do B
A and B are both nouns，and you can trade them for any noun you want.
For example, using a telescope makes it posiible to see things that are far away in the universe。
2： It does not matter whether A or B happens , C will happen.
Here is an example：
It does not matter whether it is rain or shine, the journey will happen。
原文：http://blog.csdn.net/u013628152/article/details/43559627