表达 “thank your lucky stars” 的字面意思是 “感谢你的福星”，实际用来感叹 “庆幸自己运气好” 或 “对意外的好结果感到庆幸不已”。

例句
I thank my lucky stars that I found this job when I did.
我找到这份工作时，庆幸自己运气好。

You should thank your lucky stars that you didn’t get asked to leave the meeting after you fell asleep.
你真该庆幸你在会议中睡着后没被赶出去。

He thanked his lucky stars when he was given the award.
他获奖时对自己能如此幸运不胜感激。