四级英译汉练习及答案 1. 1. Researchers have established that when people are mentally engaged, biochemical changes occur in the brain that allow it to act more effectively in cognitive(认知的)areas such as attention and memory. 2. 2. And someone with a history of doing more rather than less will go into old age more cognitively sound than someone who has not had an active mind. 3. 3. Too often we believe what accounts for others' success is some special secret or a lucky break(机遇). But rarely is success so mysterious. 4. 4. The latter ignores the higher cost of providing full services to a scattered community and the cost in both money and time of journeys to work for the suburban resident. 5. 5. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world. 6. 6. An alternative to the market system is administrative control by some agency over all transactions. This agency will issue edicts or commands as to how much of each kind of goods and service should be produced, exchanged, and consumed by each economic unit. 7. 7. Aristotle, for example, whose natural science dominated western thought for two thousand years, believed that man could arrive at an understanding of reality by reasoning from self-evident principles. 8. 8. He still has the Purple Heart awarded him after he was wounded, although he has had a difficult time keeping it. His girlfriends, explains the bachelor, have wanted to wear it. 9. 9. In the developing country where a vastly expanded population is pressing hard upon the limits of food, space and natural resources, it will be the first concern of government to pl...
