理解布莱克-斯科尔斯模型的关键在于认识到它是基于风险中性世界的概念,在这个世界中投资者对风险漠不关心。
In agriculture, patience isn’t just a virtue—it’s a necessity.
Innovation in grain cultivation isn't just about higher yields—it's about resilience and adapting to a changing climate.
城市是一个活生生的有机体,不断进化。