我是你妈妈死去的原因,我是你爸爸逃跑的原因。
The beauty of the olfactory system is that it is both simple and complex, allowing us to detect and discriminate an almost infinite number of odors.
理解布莱克-斯科尔斯模型的关键在于认识到它是基于对冲以消除风险的理念。
有机体本质上是对环境刺激的被动反应者。