成功不是终点,失败也不是致命的,重要的是继续前进的勇气。
Success is not final, failure is not fatal: it is the courage to continue that counts.
The great challenge of our time is to build institutions that can manage the complexity of modern societies.
Innovation is at the heart of what we do. It's how we meet the world's growing energy needs while addressing environmental challenges.
建模的艺术在于忽略正确的东西。