农业的进步不仅要以产量衡量,还要以长期的环境影响来衡量。
在量子世界中,信息可以同时存在于多个状态 - 这既是我们最大的挑战,也是我们最大的机遇。
Over the centuries the Indians developed sign language for communicating phenomena of interest. Programmers from different tribes (FORTRAN, LISP, ALGOL, SNOBOL, etc.) could use one that doesn't require them to carry a blackboard on their ponies.
Silence is the virtue of fools.
资本资产定价模型并非旨在成为资本市场的实证均衡理论,而是一种规范性理论,描述如果投资者以某种方式行事,价格应如何表现。