我们称可见光为什么?我们称之为颜色。但颜色只是我们给光碰到某物时的行为方式起的名字。
The city is the greatest work of architecture.
The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.
The mother is the main factor in the child's world. Her behavior creates the behavior of the child.