现代世界让我们自由，但也让我们痛苦。

Every performance is a new beginning.

每个人的生命都是上帝用手指写下的童话。

The PAC learning framework provides a formal way to quantify the learnability of a concept class.

"The best way to predict the future is to invent it."

处置效应是行为金融学中最稳健的现象之一，投资者倾向于过早卖出赢家，而过久持有输家。