Consciousness serves the organism's need to interact effectively with its world.
意识服务于有机体有效与世界互动的需求。
购买旧书，它们的词与新词相同，也可以去图书馆。
The real challenge is not growing more food, but growing it smarter with less waste.
写作是一种政治行为，它为无声者开辟空间。