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)。
I don't have to be perfect. I just have to try my best.
I think the best movies are the ones that make you think, that challenge you.
伟大不在于成为最好,而在于激发他人最好的一面。