最重要的是对自己所做的事感到快乐。

The iron rule of nature is: You get what you reward for.If you want ants to come, you put sugar on the floor.

忧心生时，你即受其所役。

Girls have to go into the world and make up their own minds about things.

数据抽象是将特定数据集简化为整体的简化表示。