A function is a rule of correspondence by which when anything is given (as argument) another thing (the value of the function for that argument) may be obtained.
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）。
Hatred destroys only the hater.
The more you praise and celebrate your life, the more there is in life to celebrate.
The only meaningful way to study learning is through objective measurement.
Global challenges require local solutions with global perspectives.