当且仅当所有投资者都持有均值-方差有效的投资组合时，市场组合才是有效的。
The consistency of your endeavors (exercise， companionship， work) is more important than the quantity. Nothing beats small things done every day， which is way more important than what you do occasionally.
我一直认为拥有愿景并坚持下去很重要。
砰的一声，我从我的粉色云端跌落。
社交媒体可能是一把双刃剑，但专注于好的部分让它变得值得。
The Langlands program is a challenge to the boundaries of human knowledge.