永远不要停止学习,世界总是在变化。
真相很少纯粹,也绝不简单。
In all of us,even in good men,there is a lawless wild-beast nature,which peers out in sleep.
The metropolis exacts from man as a discriminating creature a different amount of consciousness than does rural life.
The beauty of physics lies in its ability to explain the complex with simple laws.
Food security is the cornerstone of national security, we must firmly grasp it in our own hands.