函数是一种对应规则，通过它当给定任何东西（作为参数）时，可以获得另一个东西（该参数的函数值）。

供应链上的协作是推动有意义变革的关键。

The key to happiness is gratitude.

To write is to resist, to resist the forces that seek to silence us, to resist the forces that seek to control us.

The best way to predict the future is to create it.