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| 31. | radiation-hardened multimode fiber |
| 耐辐射多模纤维 |
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| 32. | hardened cement paste |
| 硬化的水泥浆 |
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| 33. | hardened glass bulb |
| 硬化玻璃泡 |
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| 34. | Hardened into a rock |
| 硬化为石 |
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| 35. | Old Faithful老忠实喷泉： The most famous gayer in Yellowstone National Park, erupting more than l00 feet in |
| 老忠实喷泉是黄石国家公园最著名的喷泉，每73分钟向空中喷水100英尺多高。 |
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| 36. | radiation hardened integrated circuit |
| 抗辐射集成电路 |
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| 37. | hardened neat cement paste |
| 加固的路边 |
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| 38. | scratch resistant hardened glass |
| 防划痕硬化玻璃 |
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| 39. | oil hardened tool steel |
| 油淬工具钢 |
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| 40. | radiation hardened TV cameras |
| 辐射加固电视摄象机 |
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