唯一真正安全的系统是关闭的，浇筑在混凝土块中，并密封在有武装警卫的铅衬房间中——即便如此，我仍有疑虑。

The study of algorithms is the study of methods for solving problems on a computer.

The writer is a professional observer.

形容世事变化无常，难以预测。

In business, as in life, the choices we make define who we are.

I don’t follow trends, I set them.