每本书都是作者与读者之间的对话。

当我们谈论一个词的“意义”时，首先我们在谈论一种特定的行为。

数学的美只向更有耐心的追随者展示。

I would say that in the long run probably Communist China is likely to be in more of an expansionist phase than Soviet Russia...In their tactics, the Chinese Communists are probably the greater menace;

宇宙是一个广阔而神秘的地方，充满了等待被发现的奇迹。