宏观经济学的核心问题是理解人们如何随时间做出决策。
气候变化不仅是对农业的威胁，更是重塑农业的契机。
The development of an enterprise cannot be separated from team cooperation.
石油开采的创新必须与环境管理齐头并进。
You have to believe in yourself when no one else does.
The act of writing is an act of resistance against forgetting.
I don't think that everyone should become a mathematician, but I do believe that many students don't give mathematics a real chance.