无论我多么努力，我都减不了肥。

I never manage to lose any weight, ___no ___matter ___how hard I try.

无论你在哪里，你都需要电力。

___No ___matter ___where you are, you need electricity.

无论你何时到达，门都会开着。

___No ___matter ___when you arrive, the door will be open.