translation.en: I was writing a book about sustainable energy, and a friend asked me, "Well how much energy do you use at home?" And I was embarrassed. I didn't actually know.
translation.zh: 我当时在写一本关于可持续能源的书。 有个朋友问我, "你呆在家里消耗了多少能源？" 这一问使我感到无地自容：我确实不知道。