如果数据的总体差距缩小或者变大，考生可以宏观角度去总结总体差距的变化。即“Overall, the gap among xxxx had become wider or narrower from xxx to xxx.”
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Some people think that robots are very important for humans' future development. Others, however, think that robots are a dangerous invention that could have negative effects on society. Discuss both views and give your opinion.
The research into artificial intelligence advances so fast that robots are widely used in many occasions. While some people are excited about this progress, others are concerned that robots will cause problems to society.
Using robots significantly increases efficiency and improves productivity. The amount of work a robot can finish in a day is perhaps 100 times as much as a person’s workload. Arduous and repetitive work ranging from transportation of goods and operation of machines can be done by robots, so humans have more time to do creative work and enjoy leisure activities. In addition, the application of the robot can reduce workers' exposure to various hazards that cause damage to people’s health or pose a risk of injury or death. For instance, in case of a gas blast, robots can be sent to the scene of the explosion to carry out dangerous tasks.
However, some people think the robot will bring more disadvantages to society. The first problem is the rising unemployment because manpower will be replaced by robots in the workplace. This is happening in today’s society, with numerous jobs lost and some traditional industries disappearing. Another concern is that someday robots with high intelligence may cause disastrous consequences to human society. As robots do not have sensibility or morality, they can be very dangerous if not under control. In some science fiction movies, robots have the ability to commit crimes, hurt humans or even destroy the world.
My personal view is that we should continue researching and developing artificial intelligence and make robots better serve mankind. Meanwhile, I believe supervisions and regulations need to be put into place to reduce the negative impacts when robots are integrated into society.