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...veloping countries, Internet has become more and more common. With the use of Internet, I can now travel all over the world without stepping out of my door. Most importantly, a large amount of money is saved. It opens up a new international community, which could lead to a peaceful modern world. With the development of medical technology, people can now have a better quality of life. Moreover, many lives, which normally would not survive without the advance in medical treatment, can now be artificially prolonged. Nowadays, genetic engineering essentially plays an important role. Genetic testing can predict a person's biological use-by date, forecasting everything from heart attacks to breast cancer. People can therefore have a basic concept of their health situation and prevent what is going to happen if technology allows them to know this beforehand. On the other hand, there are negative effects of technology. Weapons should only be objects of defense. However, because of the advance of technology, they have become more and more powerful. Scientists clearly know that misusing weapons will result in deaths, but they are still working towards more powerful weap...