在生活中,我们时常可以看到“随手关灯”这四个字。它提醒我们要减少一些不必要的通电时间,节约用电,不少人也养成了“随手关灯”的习惯。那么只是短时的离开,需要“随手关灯”去节约电吗?看到过灯泡丝烧断的人,应该知道家庭中白炽灯的灯丝大都是 In our daily life, we often see the words “turn off the lights”. It reminds us to reduce some unnecessary power-on time, save electricity, many people have also developed a “turn off the light” habit. So just leave for a short time, you need to “turn off the lights” to save electricity? People who have seen the blown silk blown, you should know that most incandescent filaments in the family are