I need my luck this afternoon.

我今天下午需要我的运气。

My bad luck had unexpectedly turned into a good thing.

我的坏运气意外地变成了一件好事。

Anyone who does not know how to make the most of his luck has no right to complain if it passes by him.

不知道如何充分利用运气的人无权抱怨运气从他身边溜走。

We cannot always rely on luck.

我们不能总是依靠运气。

Can you believe this damn luck?

你能相信这该死的运气吗？