Life is fragile. We're not guaranteed a tomorrow so give it everything you've got.
Life is full of uncertainties, and that is what makes it interesting.
教育者必须是一位心理学家,以便理解儿童。
海鲜的真正成本不在价格标签上,而在于我们保护或破坏的生态平衡。
理解布莱克-斯科尔斯模型的关键在于认识到它是基于创建无风险对冲的理念。