数学的本质在于其自由性。
我喜欢挑战自己,把自己推到极限。
The gender gap in economics is not just about numbers; it’s about whose stories get told.
政治制度的衰败往往是由于无法适应变化的环境,导致僵化和最终的衰落。
The real and effectual discipline which is exercised over a workman is that of his customers.