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| 41. | water mark defect |
| 水纹缺陷 |
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| 42. | immunologic deficiency disease |
| 免疫力缺陷病;免疫缺陷病 |
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| 43. | An imperfection that causes inadequacy or failure;a shortcoming. |
| 欠缺由不完善而引起的不足和失败；缺点 |
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| 44. | defective workmanship |
| 工艺缺陷 |
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| 45. | Any touch of imperfection need cause no great alarm |
| 任何一点的不完美都不必引起大惊小怪。 |
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| 46. | An optical defect. |
| 视觉缺陷 |
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| 47. | Ingot defects may be broadly classified into internal flaws and surface flaws. Internal flaws are caused by shrinkage. |
| 钢锭缺陷广义上可分为内部缺陷和表面缺陷。内部缺陷是因收缩引起的。 |
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| 48. | Artificial defect |
| 人工缺陷 |
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| 49. | a corporal defect; |
| 身体缺陷； |
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| 50. | acoustic defect |
| 音质缺陷 |
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