模糊逻辑的本质在于，一切都是程度的问题。

If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."

Sustainability is not just a trend, it's a responsibility.

理论计算机科学是一个领域，其中深刻的数学见解导致了实用的计算工具。