| 21. | The discovery of polio vaccine was a great event in medicine. |
| 小儿麻痹症疫苗的发现是医学上的一个重大事件。
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| 22. | News of the discovery of gold in California excited the nation. |
| 在加利福尼亚发现金矿的消息轰动了全美。
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| 23. | He passed by the name of Baker for many years, so a voiding discovery by the police. |
| 多年来他使用贝克这个名字，逃过了警察的眼睛。
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| 24. | The discovery is hardly commented by the press. |
| 报纸对这项发现几乎未加评论。
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| 25. | The discovery lends some colour to the charges. |
| 这一发现增加了这些指控的可信程度。
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| 26. | I warmly congratulated him on the marvellous discovery . |
| 我热烈祝贺他作出的惊人发现。
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| 27. | It is claimed that this discovery will revolutionize surgery. |
| 据称这一发现将彻底革新外科手术。
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| 28. | The discovery of nuclear fission is a new departure in physics. |
| 核裂变的发现是物理学上的一个新起点。
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| 29. | His discovery gave the science a new direction. |
| 他的发现给这门科学指出了新的方向。
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| 30. | The Greeks ascribe the discovery of iron to themselves. |
| 希腊人认为铁是他们发现的。
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