我可以松了一口气。

I can give a sigh of relief.

谢天谢地，你终于来了。

Thank goodness,you're coming.

可以松一口气了。

That's a relief.

使我感到欣慰的是。。。

To my relief....

听说他的病好了，我就放心了。

I'm most relieved to hear that he is well.

幸好你没搭那班飞机。

It's lucky you didn't take that plan.

幸运的是。。。。

Lucky enough....

麻烦终于走了。

Good riddance.