bulbwillhavebeenb的精選

問題詳情： ThomasEdison'sincandescent(白熾的)light-bulbwillhavebeenbroughttoanendby2016becauseitusestoomuchenergy.The"greatlighthope"toreplaceitisabulbmadefromlight-emittingdiodes(兩級管),orLEDs.Mor...