With the rapid development of modern science and technology, human civilization has entered a new era from ancient times. The development of science and technology makes human beings closely related to it. What human beings need for survival depends entirely on technology. Because human beings are inseparable from science and technology, the double-edged sword of science and technology is slowly showing its edge. We often use disposable plastic bags in our daily life, especially near the vegetable market. Plastic bags can be seen everywhere. Although convenient, many a mickle makes a mickle, which will also bring unnecessary disasters. This kind of plastic bag is called "white pollution" because of its destructiveness. Incineration will produce a lot of toxic substances, while burial will seriously pollute a large area of soil. Technology is harmful, but it has made China people's dream of flying for thousands of years come true. It is the blazing flame and brilliant science and technology that enabled hundreds of millions of people in China to witness the instantaneous leap of China. Nowadays, the crystallization of technologies such as computers, mobile phones, airplanes, automobiles and "GPS" is not pushing mankind into a bright era? The power of science and technology has advantages and disadvantages, but as long as human beings don't wave these infinite double-edged swords at will, science and technology will only bring convenience, speed and portability to human beings. Therefore, only by using science and technology correctly and not using it to cause damage can we really live a peaceful and happy life! Teacher's comment: As the author said, technology is a double-edged sword, which brings many side effects while benefiting mankind. This paper discusses the influence of science and technology on our lives from both positive and negative aspects, and puts forward some suggestions on the correct use of science and technology. The words in the article are appropriate and clear. If you can demonstrate the advantages and disadvantages of science and technology with examples, and add more examples, then the article will be more convincing! The development of science has caused many unexpected facts, and nuclear technology is a good example. While people are enjoying the continuous current from nuclear power plants, the cloud of nuclear war hangs over their heads. Memory transplantation is also a terrible double-edged sword. Almost everyone will go crazy with excitement at the thought of this prospect. You can become a great thinker, artist, writer and scientist effortlessly ... science will advance by leaps and bounds, and social progress will advance by leaps and bounds! All this is because of "memory transplantation" technology. If memory can be transplanted, we can easily transplant the memories of various social elites for ourselves and make ourselves the elite of the elite! Moreover, how many social resources can be saved because the intermediate link of learning is omitted! It is of great benefit to individuals and society. Of course, those elementary and intermediate exams can also be exempted-think about it, let a person with Einstein's memory take the middle school physics exam? Ridiculous! However, if things do the opposite, the consequences will be really terrible. If memory can be transplanted, you can have the memories of relatives, friends or strangers. It may just happen that you have grandpa's memory, so how do you get along with your father and your sister? How to protect personal privacy? If you have a stranger's memory, how do you deal with his relationship? How to deal with the relationship with his relatives and friends? Perhaps, the ethics on which human society depends will collapse once! Another terrible consequence is that if this technology falls into the hands of a fanatical terrorist, if this terrorist uses this technology to transplant the memories of Hitler, scientists, artists, criminals and others and become a super criminal. And if there are many such super criminals, they are outstanding in all kinds of technologies, they have the most advanced weapons and carry out the most destructive terrorist activities, what will the world become? At that time, what dark clouds will hang over human heads? In contrast, it doesn't matter whether getting something for nothing will bring happiness to people. Science is a double-edged sword, and "memory transplantation technology" is one of them. If used well, it will benefit mankind; If it is not used well, it will bring disastrous consequences! Look out, human!