从n对观测值的样本中获得的相关系数的可能误差是sqrt((1-r²)/(n-2))。
海洋是各国共同的高速公路。
The price of inaction is far greater than the cost of making a mistake.
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
蓬皮杜中心是一个巨大的Meccano玩具套装，一个内外颠倒的建筑。
Man, unlike any other thing organic or inorganic in the universe, grows beyond his work, walks up the stairs of his concepts, emerges ahead of his accomplishments.