I cannot believe that it is sensible to spend so much.

我不信花费么多有什么用。

You know how pools winners always say it won't change their lives? Yeah, as if.

你知道那些足球赛赌博赢家总是说赢了钱还是改变不了他活吗？当然知道，可我才不信呢。

If not believe in love, how should we pass the longness of our lives?

如果不信爱，我如何度过人漫长？

An appointment at the dentist my arse! She’s gone shopping!

约好去看牙医，我才不信！她去逛商店了！

They have discounted the rumours.

他不信那些谣传。

I happened to see this thread, which said to be very horrible, and people not believing in supernature should not read, and threat of life sort of craps.

无意中看到样一个贴子，说什么极度恐怖，不信邪者慎入，还说什么有命危险云云。