数学的本质在于它的自由。
"The essence of mathematics lies in its freedom."
蒸汽机中运动的产生总是伴随着一个我们应关注的情况,即热量的平衡重建。
读书贵在能有疑问,有疑问方能增进对事物的了解。
The study of economic history is not just about the past; it’s about understanding the roots of present inequalities.