what do you mean

来源: 亚当撕蜜 于 2012-07-03 09:07:31 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (281 bytes)
回答: nothing's wrong with that picture. 由 赵飞燕 于 2012-07-03 09:01:31

i'm "now" older? i'm older every day, just like you are, and i'm wiser every day too, are you? lol...

good point on decelerating rate of relative change, so the second order derivative, the change of the rate of change matters too.

 

 

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