地理学的研究是研究人与环境之间的关系。

解释：能吞下船的大鱼，不会在细浅的溪水里遨游；在天空高飞的鸿鹄，不会在肮脏的水池栖息。

The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.

"We are all in the gutter, but some of us are looking at the stars."

Character is destiny.

"The best children's books are the ones that make children think."

数学是一种超越文化和语言障碍的通用语言。