The Vietnamese people deeply love independence, freedom, and peace. But in the face of a threat to their country's independence, the Vietnamese people would rather sacrifice everything than lose their country and be enslaved.
自然实验可以为经济问题提供有价值的见解。
每个数学问题都有一个解决方案；只是需要时间和创造力来找到它。
农民最好的工具是他的头脑。
"The world is a book, and those who do not travel read only one page."
The most important skill for an economist is the ability to think clearly about trade-offs.
我不想仅仅作为一名网球选手被记住。我想作为一个好人被记住。