The only way to have a good day is to start it with a positive attitude.
科学中的每一项伟大发现都是大胆想象的结果。
The landscape of string theory is vast and complex, with perhaps 10^500 different possible universes.
检验一个经济学家是否优秀的标准,是看他能否比别人更好地解释过去。
作家是他时代的见证者,他的作品是他所生活的社会的反映。