用户需要的不是电动车，而是更好的出行体验。
The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.
The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.
Every role is a journey, and every journey teaches you something new.