Sustainable agriculture is not a slogan but a responsibility—we must preserve green mountains and clear waters for future generations.
代数是人类创造的一种智力工具，用于清晰地表达世界的数量关系。
生活的意义在于产生影响，而不是赚取收入。
The truth is rarely pure and never simple.
The only person you should try to be better than is the person you were yesterday.