数学的统一性不是幻觉,而是等待被揭示的现实。
The unity of mathematics is not an illusion but a reality waiting to be uncovered.
The galactic center is a unique natural experiment in strong gravity.
过去是一位老师,如果我们愿意学习的话。
幸福,就像不幸一样,是一个主动的选择。