"Language is a skin: I rub my language against the other. It is as if I had words instead of fingers, or fingers at the tip of my words."

因此，教学艺术无非是时间、科目和方法的巧妙安排。

When we write programs that "learn", it turns out that we do and they don't.

音乐让我找到方向，也让我迷失方向。