(1st)The Effects of an Invention or Innovation in Modern Life

In the 20 century, the one of the most popular invention is the "Refrigerator". Nowadays, people use the refrigerator to keep the food fresh. The most important advantage of refrigerator is convenient to keep the food fresh. Before the refrigerator was invented, people reserving food was difficult, because the food is perishable at room temperature. People preserved some kind of food, like fish, pork or fruit to store for passing the hard time. But the preserved food is unhealthy and not fresh. Than the refrigerator was invented, people can easier keep the food fresh for several days. You just put the food in the refrigerator, and close the door of refrigerator; the refrigerator will keep the food cool, the food is imperishable at low temperature. Another advantage of the refrigerator is "enjoyment". In the summer, people will store something iced in the refrigerator that they can eat or drink when they feel hot. It is an interesting part of summer life. The refrigerator is become a standard piece of equipment in everywhere, people will hard to live without the refrigerator.