I was late, but fortunately the meeting hadn't started.
我遲到了，不過幸好會議還沒有開始。
Fortunately, common sense prevailed.
幸而理智占了上風。
Fortunately for me, my friend saw that something was seriously wrong
對我來說幸運的是，我的朋友發現了非常嚴重的錯誤。
Luckily, I'd noticed where you left the car
幸運的是我注意到了你把車停在哪里。
Luckily, Nancy's father and her attorney were one and the same person
幸運的是，南希的父親就是她的律師。