水是地球的血液，我们必须合理有效的使用水。以确保我们自己和后代能有足够的水源。以下技巧能帮你更加合理的用水。户外洗汽车时，将皂液和水放在桶里，使用一个带有开关的水管来冲洗，用扫帚清洁车道。喷洒草地时不要让人行道或街道也渗入水；在多风的天气不要给草地浇... Water is the blood of the earth, we must use water reasonably and effectively. To ensure that we and our children have sufficient water. The following tips can help you more reasonable use of water. When washing the car outdoors, put the soap and water in the bucket, rinse with a water hose with switch, and clean the driveway with a broom. Do not allow sidewalks or streets to penetrate the water while spraying the grass; do not give grass to the windy weather ...