| 21. | His version of the role has matured. |
| 他演这角色已经熟练了。
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| 22. | She acted the role of the perfect servant for three years before Aunt Harriet discovered her 'little weakness'. |
| 她担任“理想仆人”角色3年之后，哈丽特终于发现她有“小小的弱点”。
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| 23. | A famous actor in a highly successful play was once cast in the role of an aristocrat who had been imprisoned in the Bastille for twenty years. |
| 有一位名演员曾在一出极为成功的剧目中扮演一个贵族角色，这个贵族已在巴士底狱被关押了20年。
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| 24. | Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role . |
| 动物发出的声音不都是用作语言交际。我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。
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| 25. | She was intended to play a leading role in the growing might of Sweden. |
| 目的就是要在不断增长的瑞典势力中起主导作用。
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| 26. | The fact of first-rate importance is the predominant role that custom plays in experience and in belief, and the very great varieties it may manifest. |
| 最重要的是，风俗在实践中和信仰上所起的举足轻重的作用，以及它所表现出来的极其丰富多采的形式。
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| 27. | There is no social problem it is more incumbent upon us to understand than this of the role of custom. |
| 没有任何一个社会问题比得上风俗的作用问题更要求我们对它理解。
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| 28. | The joint venture will be more successful if one firm is willing to play a passive role . |
| 如果有一方合营者甘愿充当配角，那么这个合资企业可能会取得更大的成功。
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| 29. | It is conceivable that knowledge plays an important role in our life. |
| 可想而知，知识在我们的一生中扮演一个重要的角色。
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| 30. | Although many people tend to live under the illusion that traditional technology and methods are still playing extremely important role in people's life, an increasing evidences show that it is less useful than many people think. |
| 尽管许多人保持着传统观念，认为传统技术方法在人们生活中仍发挥着重要作用，但是越来越多的证据显示它并没有人们想象的有用。
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