文学是社会的镜子，它反映了社会的光明与阴暗。

The brain has specialized networks for maintaining alertness, orienting to sensory events, and resolving conflict among responses.

大自然是一位了不起的老师，只要我们耐心观察，她就会向我们揭示她的秘密。

The beauty of mathematics lies in its ability to describe the world in a language that is universal.

创新不是一蹴而就的，而是需要不断积累和突破的过程。

能源的未来在于平衡经济增长与环境管理。