I think that the thing that makes mathematics worthwhile is the fact that it has this incredible structure that you can explore and discover.
身份经济学是关于身份如何影响经济结果的。
The construction industry must evolve—or risk becoming obsolete.
每一个心理行为都在生活的经济中有其位置。
"The past is a shadow that follows us, but it is also the light that guides us forward."