知识在心灵中以符号结构的形式表征。
The future belongs to those who are willing to adapt and evolve.
The path to clean energy begins with making current practices cleaner.
数学家研究纯数学不是因为它有用；他研究它是因为他喜欢它，他喜欢它是因为它美丽。
The moment of victory is much too short to live for that and nothing else.
True leadership is about empowering others to succeed.
解释：形体弯曲，影子自然就曲；形体正直，影子自然就正。
I don't think you should ever have to apologize for your excitement.
The only merit I have is to have painted directly from nature.