It didn't rain, which turned out to be a stroke of luck.

天没下雨，结果成为一次好运。

《柯林斯英汉双解大词典》

Was he born to be successful, or did he just luck out?

他是天生注定成功，还是侥幸成功呢？

《柯林斯英汉双解大词典》

Merlin arranged a pageant where many knights came to try their luck at pulling a sword out of a stone.

梅林安排了一场表演，让许多骑士来碰碰运气，试着从石头中拔出一把剑。

youdao

If they do make big bets maybe they get lucky once, or twice,or three times, but ultimately their luck is going to run out.

搏大了,可能会侥幸那么一次,两次或三次,但最终运气是会用完的

耶鲁公开课 - 金融市场课程节选

This is about the time I would expect to have my luck run out, to have some Foot Knight charge up behind me with a pole-axe and thwack me to death.

FORBES: Connect

That caused the folks who had been using high, probably inflated, vacation type homes, think timesharing, as loss generators for reductions of taxes owed were suddenly out of luck and had to move what turned out to be billions and billions invested in these tax shelters out of those and into other productive investments.

FORBES: J P Morgan Breached its Risk Limits More Than 330 Times in 2012

You might even luck out and get to smoke.

FORBES: Social Networking for Men, Old Style