【解释】人常常在忧患困苦中，才能磨练意志，增长才干。

"The world is a book, and those who do not travel read only one page."

大智慧的人广博豁达，小聪明的人斤斤计较。

The study of mathematics is the indispensable basis for all intellectual and spiritual progress.

It is only very ugly or very beautiful women who ever hide their faces.

如果你不愿意冒险，你就不会取得非凡的成就。

We work with the earth, not against it.

在追求真理的过程中，我们必须愿意被最简单的事实所纠正。