数学的进步是通过不断质疑已建立的真理来实现的。
Global hunger won't be solved by charity alone - it requires systemic change.
你不可能不了解历史。
不是知识,而是学习的行为;不是占有,而是到达的过程,才能带来最大的快乐。
A method of solution is perfect if we can foresee from the start, and even prove, that following that method we shall attain our aim.
"In every equation, there is a story waiting to be told."
能源的未来在于平衡经济增长与环境管理。