Mathematics is the foundation upon which we build our understanding of the world, and it is through this understanding that we can solve the most complex problems.
性格不是你与生俱来且无法改变的东西,比如你的指纹。它是你并非与生俱来且必须负责塑造的东西。
煤炭的未来取决于我们能否使其更清洁、更高效。