一天下午放学，小鄂正要回家，路过学校水管时，发现水龙头没关上，就走过去，关上水龙头。
One afternoon after school, Xiaoe was about to go home. When he passed the school water pipe, he found that the tap was not turned off, so he went over and turned off the tap.
他回到家，开始做作业。做完作业后，他就开始看电视，忽然想：如果人们不节约用水的话，以后我们还有饮用水用吗？今天有人没关水龙头，说不定以后还有人没关水龙头呢！于是小鄂找来一张白纸，在上面写了四个大字——节约用水，把它贴在学校水龙头旁边。
He came home and began to do his homework. After finishing his homework, he began to watch TV, and suddenly thought: if people don't save water, do we still have drinking water in the future? Someone didn't turn off the tap today. Maybe someone didn't turn off the tap in the future! So Xiaoe found a piece of white paper and wrote four big words on it - save water and paste it beside the school tap.
后来，他再也没发现学校水龙头没关上了。
Later, he never found that the school tap was off.