46. We must avoid overindulgence and conspicuous consumption . We must instead continue to recognize the benefits of thrift in order to protect our newfound prosperity .
我们必须避免过分放纵和铺张浪费。相反，我们应该继续发扬节俭的优点以守护我们新获得的繁荣。

47. It is absolutely essential to reverse the irrational misuse of nonrenewable resources . For example , fuel-efficient motor vehicles must be developed to reduce oil consumption and alternative energy sources must be found to replace coal .
彻底改变对不可再生资源的非理性滥用是绝对有必要的。例如，必须开发节能的机动车减少汽油的消耗量，并且必须找到可替代能源取代煤。

48. While achieving success is easier said than done , persistence does in fact pay off . One of the most important traits of a successful person is self-confidence , another is desire , and still another is determination .
获得成功说起来比做起来容易，然而坚持不懈确实会有好结果。成功人士的最重要的特征之一是自信，第二是渴望，还有一个是决心。

49. Recognizing a problem is the first step in finding a solution .
认识到问题是找到解决办法的第一步。

50. Many of the explanations offered thus far are at least to a certain extent valid , but none fully address the problem and the issue must be examined in a wider context .
目前提供的许多解释至少在一定程度上是正确的，但是，没有一个解释能完全处理问题，这件事情必须放在更广阔的背景中考虑。

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