过去从未死去,它甚至还未过去。
The boundary between physics and mathematics is not as clear-cut as one might think.
Success is not final, failure is not fatal: It is the courage to continue that counts.
经济学特别是宏观经济学中说的投资是耐用资本品如厂房设备的生产,而平常说的“投资”是指购买资产如股票,这和经济学中的投资不同,为了区分,这种投资被称为金融投资。
可持续性不是一种选择,而是我们共同的责任。