海洋不仅仅是一种资源;保护它是我们对后代的责任。
I never buy anything unless I can give myself a good reason why I should buy it.
The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle.
凡是教师缺乏爱的地方,无论品格还是智慧都不能充分地或自由地发展。
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。