最虚度的日子,是那些没有欢笑的日子。
I might be in love with you. I'm waiting until I'm sure to tell you, though.
I don't like being defined because I'm ever-changing.
PAC学习框架提供了一种形式化的方法来量化概念类的可学习性。
"Imagination is the most powerful tool we have to create a better world."