寻找互反律是数学史上的一个基本主题。
The search for reciprocity laws is a fundamental theme in the history of mathematics.
The agriculture of tomorrow must be built on the lessons of today.
"The past is always with us, for it feeds the present."
世界是一个阴谋,目的是不让你知道真相。
"The world is a very puzzling place, and it is a great privilege to be able to think about it."