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》

But, if you want to make your data portable across carriers, you may be out of luck.

但是假如你想是你的数据能在运营商间方便地迁移，那可能就比较难了！

youdao

It may be fairer to say that, dealt a rotten hand, Mr Wagoner tried to do many of the right things, but ran out of luck and time.

也许更为公平地说，对付一只已经腐烂的手，瓦格纳先生设法做了很多正确的事，但运气不佳，时机不对。

youdao

If you need a doctor in a hurry, you used to be out of luck.

FORBES: DocASAP Vies For Top Spot in MD Scheduling

Gary Scalone proved to be an exception to the out of luck rule, but just barely.

FORBES: Divorce Lawyers - Frequently Not The Best Tax Advisors

Her desperation turned out to be stroke of good luck for us.

FORBES: Taking Rides from Strangers, Or How A Possible Marriage Proposal Can Make A Sane Person Crazy