Unit 1
翻译：
Human brings live in the realm of nature. They are not only dwellers in nature, but also transformers of it. With the development of society and its economy, people tend to become less dependent on nature directly, but indirectly their dependence grows. Human beings are connected with nature by "blood" ties. No one can live outside nature. However, the previous dynamic balance between man and nature has shown signs of breaking down. Problems such as the population explosion, ecological imbalance and the shortage of natural resources have become major factors keeping human society from being further developed. Professor Spirkin holds that the only choice for human beings is the wise organization of production and care for Mother Nature.
范文：
My Understanding of Environmental Protection
sort of career翻译
Man and the environment are closely related. Man relies on the environment for water, food and shelter. A harmonious relationship between man and However, man and the environment have never been on such bad terms as they are now. As society develops, man’s transformation of nature has severely polluted his living environment. Deforestation leads to changes in rainfall patterns, causing devastating floods, droughts and sandstorms. The discharge of chemical pollutants endangers our health and the lives of other beings. And mass production has resulted in the shortage of irreplaceable natural resources such as coal and oil. If we take no immediate and effective steps to protect our environment, human beings may be the next species to become extinct. We should do our best to protect our environment by planting more trees, taking care of wildlife, reducing industrial wastes, using renewable energy, and imposing heavy fines on environmentally-unfriendly activities, so as to preserve the environment for future generations.
Unit2
翻译：
Nowadays, many people are enjoying the benefits brought about by material and technological advances unimaginable in previous eras. With the development of science and technology, people’s standard of living is getting higher and higher. People’s life expectancy has soared, too.
However, oddly enough, many people do not feel happier than they used to be. It can be seen that there is no close correlation between people’s income and their happiness. Happiness cannot, after all, be bought with money.
Although the majority of people are not very satisfied with their lives, they are happy to be alive, and the more time they get on earth, the better off they feel they’ll be. What is important is that material wealth is far from enough. People need spiritual happiness, too.
范文：
The Impact of the Mobile Phone on People’s lives
Among the many technological inventions, the mobile phone impresses me most.
The mobile phone brings considerable convenience to our lives. It not only enables us to keep in touch with each other almost anytime and anywhere but also helps us solve problems or do business efficiently. In emergencies, a mobile phone can even be a life-saver. Besides, its multi-functions add ease and color to our lives. With a mobile phone, we can receive mail, read news, listen to music, play games, and take pictures.
Yet, the mobile phone has its disadvantages, too. Most of us have experienced the nuisance of unwanted or wrong calls. We are inconvenienced by calls on occasions when we least expect one. Besides, the technology infrastructure to support mobile communication has consumed valuable natural resources and caused significant environmental problems. It is reported that electromagnetic radiation waves from the phone may result in health problems.
Despite its negative side, the advantages of the mobile phone outweigh its disadvantages. I believe that with advances in science and technology, improved and safer models of mobile phones will surely serve us still better.
Unit 3
翻译：
范文：
Barriers to Knowledge Transfer
  Knowledge transfer is a human phenomenon and plays a very important role in the process of human evolution. With the knowledge accumulated over generations, human beings can now build and transform societies with unprecedented knowledge resources.
  However, there are many barriers to knowledge transfer. For example, lack of trust and resistance to change undermine the transfer of knowledge. People are less likely to acquire knowledge from those whom they don't trust or to adopt new theories and practices they are not familiar with. Cultural and language barriers also hamper the transfer of knowledge between nations or ethnic groups. It would be almost impossible for people who speak different languages or dialects with different cultural backgrounds to communicate effectively, not to mention exchanging knowledge.

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