人类并非天生社会动物。

Efficiency in grain production isn't an option—it's a necessity.

我想解放美国，我希望人们为自己是谁而感到自豪。

伽罗瓦群和自守形式之间的联系是数学中最深刻的奥秘之一。

The process of scientific discovery is as important as the discovery itself, for it teaches us about the nature of inquiry and the limits of our understanding.