The key to progress is persistence and curiosity.
最优财政政策要求税率随时间平稳变化,仅对政府支出的永久性变化作出反应。
Science must be a force for good in the world.
每个人都有这样的心,心中都具备这样的理。
We are all given one thing by which our lives are measured, one determination.
Language is not just a system of symbols, but a set of practices with social and cultural significance.
Technology should serve the land, not dominate it.