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）。
The best stock to buy is the one you already own.
"It's not the load that breaks you down, it's the way you carry it."
The dirty little secret is that you don’t have to be a nice person to be a great artist.
