what does this sentence mean?Change electric wares into energy efficient ones and leave no more than one light open when you leave home.这句是说把所有的灯都关了,还是只开一盏灯?

what does this mean? What does this What does this mean?翻译 what does this sign mean? What does this code imply? What does this idiom mean? What does this idiom mean? what does this mean?还是what is this mean? what does this word mean?急 智力What does this mean IM2BZ2CU what does this picture describe?怎么回答? what does this sign mean 的意思 what does this mean啥意思 What does this passage tell you? What does all this come down to 英语翻译What does this passage tell us？ （急!）What does this unit____?填空 What does this baby live ( Milk