In fact, it is not necessary for people to return to some primitive existence to save electricity. The reason why previous efforts at saving energy all failed was that they stopped at reliance on slogans like "just lift up your hand and turn off the light," which was simply not enough.
事實上，節電並不是要大家回到原始生活，過去節約能源無法見成果，主要在光靠「舉手之勞關電燈」是不夠的。