Science and technology are the base of modern societies. Take a look at some of our home appliance and small stuff, which also reflect the development of science and technology. For example, a cell phone reflects the achievement in various subjects, with hundreds of technical inventions. If you think it is too complicatd to understand, please take some simpler things, such as toothbrushes, kitchen knives, and even dishwashing sponge, lunch boxes, to see which kind of technology is used.