投资操作是基于透彻的分析，承诺本金安全，并获得满意回报。任何不符合这三条的就是投机。

An investment operation is one which upon thorough analysis promises safety of principal and a satisfactory return.

如果你不感到担忧，你担忧得还不够；如果你过于担忧，你就做不成任何事。

If you're not worried, you need to worry — and if you're worried, you don't need to worry.

好的投资是那些即使在不利情况下也能保护你本金的投资。

Good investments are those that protect your principal even in adverse conditions.

在交易中，最重要的是知道什么时候退出。

In trading, the most important thing is knowing when to exit.