人类的历史是在不同气候条件下为生存而斗争的记录。

With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.

言语当然是人类使用的最强效的药物。

最成功的企业是那些将利润与目标结合的企业。

科学家不是给出正确答案的人，而是提出正确问题的人。