资本资产定价模型(CAPM)是理解风险-回报权衡的有用工具,但它远非完美。
竹简和丝帛文献的研究为了解中国古代文明打开了一扇新的窗口。
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
Sustainability is the future of quarrying, and we must act now.