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71. | A plastic membrane serves as selective diffusion barrier. |
| 一层塑料薄膜起着选择性渗透屏障的作用。 |
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72. | A screen for protection against the wind. |
| 风挡用于防风起保护作用的屏障 |
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73. | noise barrier reserve |
| 预留作为设置隔声屏障的土地 |
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74. | The new dam was a bulwark against future floods. |
| 新水坝是将来抵御洪水的屏障。 |
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75. | We planted a screen of trees to keep out the wind. |
| 我们种下一排树作为挡风的屏障。 |
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76. | By 2005, three green shelters will be formed for the city. |
| 到2005年,完成三道绿色生态屏障建设。 |
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77. | The screen on which sheets of paper are formed in a papermaking machine. |
| 造纸网造纸机上形成纸张的屏障 |
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78. | The terrorists leapfrog any new barriers we erect. |
| 恐怖分子交互行进 不管我们竖立什么屏障 |
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79. | The mountain rose up in a steep wall of rock. |
| 这座山高而陡, 形成一道岩石屏障. |
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80. | a stand can Be made against invasion By an army; no stand can Be made against invasion By an idea. |
| 我们可以建立起一道屏障来阻止一支军队的入侵,但是不可能建立起一道屏障来阻止一种思想 |
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