That is why we also say, opportunity knocks but once.

这就是我们也说“机不可失，时不再来”的原因。

I mean, it's said how it happened, but, you know, when opportunity knocks, you gotta answer the door, right?

我是说，这一切怎么发生的啊，可是，你知道的，机会找上门来你就得抓住，对吧。

People who work hard help make their own luck by being ready opportunity knocks.

努力工作的人通过随时准备好机会来帮助自己创造好运。

People who work hard to help make their own luck by being ready when opportunity knocks when it comes to success.

那些努力工作的人 通过在机会来敲门时做好准备来帮助自己创造运气。