相关系数的可能误差不是可以从第一原理推导出来的东西,而是必须通过经验找到的。
他的美德我都不喜欢。我喜欢的坏他也都没有。
当你不再担心别人怎么想的那一刻,你就自由了。
"Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."
Don't go around saying the world owes you a living. The world owes you nothing. It was here first.