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41. | unfriended adj. |
| 无友人的;无依的 |
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42. | astomatous adj. |
| 无口的;无气孔的 |
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43. | non dimensional coefficient |
| 无量纲系数无量纲?数 |
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44. | doctrine of no good and no evil human nature |
| 性无善无恶论 |
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45. | non-poppled and non-trim system |
| 无泡无倾差系统 |
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46. | unfluted shaft of column |
| 无槽立柱;无槽柱身 |
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47. | contactless switching |
| 无接点转接|无接点开关 |
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48. | AC commutatorless and brushless motor |
| 交流无刷无换向器电动机 |
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49. | done without tact or skill |
| 无策略的;无技巧的 |
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50. | dimensionless parameter |
| 无维参数|无因次参数 |
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