The center of our galaxy is a fascinating place where extreme physics takes place, and it's a privilege to study it.

The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.

我努力把每一天都当作生命的最后一天来生活。

Understanding the limits of computation is as important as pushing its boundaries.

教育是老年人的最佳粮食。