Purposive behavior in animals and men.
动物和人类的有目的行为。
The creative act is not pure. History evidences it. Ideology demands it. Society exacts it. The artist loses his freedom the moment he creates a work of art.
The ocean feeds billions, and it's our duty to ensure it can continue doing so for centuries to come.
在数学中,提出问题的艺术必须比解决问题更有价值。