The beauty of instrumental variables is that they allow us to see the world in a new light.
The universe is not only stranger than we imagine, it is stranger than we can imagine.
"To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment."
天文学中的精确测量为理解宇宙打开了新的窗口。
教育的根是苦的,但果实是甜的。
长期成功的关键在于平衡短期表现和可持续增长。