第四步：实践与提高
　　补充练习：将下列句子翻成汉语，注意总结句子结构。
　　1. In a society that changes as fast as ours, experience simply does not have the value that it does in more stagnant societies.
　　2. It has taken a long time to convince the public that free enterprise does not mean that a company should be free to pollute the air, foul the rivers, and destroy the forests. 　　　　3. Equipped with the money, one can acquire the taste, style, and ideas that mark each class and launch a quick ascent of the social ladder.
　　4. No one could seriously think that anyone who grows up poor, lives in a bad neighborhood, and attends an inferior school has an opportunity equal to that of someone more favored.
　　5. As the case illustrates, competition takes four general forms: …

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