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| 21. | strategic and critical raw material |
| 战略与稀有重要原料 |
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| 22. | Endangered Species Advisory Committee |
| 保护稀有动植物咨询委员会 |
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| 23. | It also has some rare collections. |
| 还有些稀有收藏品。 |
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| 24. | caught sight of a rare Bird. |
| 看见了一种稀有鸟类 |
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| 25. | Some, like the Schipperke and Tibetan Spaniel are uncommon sights in the average neighborhood. |
| 有些犬是在一般地方很难见到的稀有品种，象舒柏奇犬、藏猎犬等。 |
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| 26. | conservation of rare plants |
| 珍贵稀有植物的保护 |
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| 27. | It all started years ago when a couple of them discovered she had a rare species of woodpecker coming to her bird feeder. |
| 这一切发生在多年前，有两个鸟类学家发现有只稀有品种的啄木鸟来吃她喂食器里的食物。 |
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| 28. | The need to economize scarce energy resources. |
| 节约使用稀有能源的必要性 |
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| 29. | off-type variety |
| 非典型品种;变劣品种 |
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| 30. | extraordinariness as a consequence of being rare and uncommon. |
| 因稀有而显得不一般。 |
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