科学家们似乎仍未充分理解,所有地球科学都必须为揭示地球早期状态提供证据。
国家是理性的行为体,它们寻求最大化相对权力,以确保在竞争性的国际体系中生存。
Entrepreneurs must take responsibility for their employees and society.
玫瑰是有很多朵,她并不是独一无二的,但是就是因为你的灌溉,让她变得与众不同,让她变得独一无二。
"Books are the way that we communicate with the dead. The way that we learn lessons from those who are no longer with us, that humanity has built on itself, progressed, made knowledge incremental rather than something that has to be relearned, over and over."