I can give a sigh of relief.
謝天謝地,你終于來了。
Thank goodness,you're coming.
可以松一口氣了。
That's a relief.
使我感到欣慰的是。。。
To my relief....
聽說他的病好了,我就放心了。
I'm most relieved to hear that he is well.
幸好你沒搭那班飛機。
It's lucky you didn't take that plan.
幸運的是。。。。
Lucky enough....
麻煩終于走了。
Good riddance.