早餐•2016年1月9日

#早餐•2016年1月9日##My favorite coffe#Pleasure-pain doctrine-- to realize as much “pleasure” and to avoid as much “pain” as possible. Economists labled the want-satisfying power of goods and services as “utility”. 从美食中得到的效用最直接最本能最愉悦^ω^

2016-01-09