It says that good health can sometimes be a matter of luck.

VOA: special.2009.09.16

This would be good luck if you were long and now suddenly you got a huge return that you would not have thought was possible since you've never seen it before.

如果你长期持有这份投资,你就走运了,回报如此之高,你自己都没有料到,可能你也从来没有见过这种情况

耶鲁公开课 - 金融市场课程节选

but sometimes when I have a really good day and I'm feeling my luck is good,

有时候，可能某一天特别顺利，我感觉我这天的运气挺好的，

沉迷于彩票的人们 - SpeakingMax英语口语达人

This is a part of an old tradition where dancers wearing costumes or animal furs dance from house to house to bring good luck.

VOA: standard.2010.01.01

The romance heroine is often threatened with rape, but by her cleverness or by good luck or a concatenation of forces ; she can always invariably avert that tragedy; and by the end of the work she can present herself to her future husband as a virgin.

这位传奇的女英雄总是被强奸所威胁，但是多亏了她的机敏，或是走好运，或是一连串的军队暴力,她总是能避免悲剧;,在作品的最终,她呈现在未来丈夫面前的仍是一个处女。

耶鲁公开课 - 弥尔顿课程节选