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| 41. | noise barrier programme |
| 隔音屏障设置计划 |
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| 42. | blood-air barrier |
| 血－气屏障 |
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| 43. | blood-brain barrier |
| 血－脑屏障 |
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| 44. | protected harbor |
| 有屏障的港口 |
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| 45. | natural noise barrier |
| 天然噪音屏障 |
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| 46. | landscaped barrier |
| 绿化隔声屏障 |
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| 47. | blood-thymus barrier |
| 血－胸腺屏障 |
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| 48. | over-road noise barrier |
| 高架式隔音屏障 |
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| 49. | blood-eye barrier |
| 血眼屏障 |
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| 50. | Building green ecological shelters for the capital ? |
| 建设首都绿色生态屏障。 |
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