一把钥匙开一把锁是常见的生活哲学,可是多少年来,多少家庭都用肥皂、洗衣粉、洗涤灵来解决所有的清洗卫生工作,不仅费力费时,更难以使物品彻底洗净。如果倒退二三十年,人们用一块肥皂从 A key to open a lock is a common philosophy of life, but many years, how many families are using soap, detergent, washing spirit to solve all the cleaning and sanitation work, not only time-consuming and more difficult to make the items thoroughly washed. If you go back twenty or thirty years, people use a piece of soap from