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51. | logical expression |
| 逻辑表达 |
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52. | logical combination |
| 逻辑组合 |
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53. | logical connector |
| 逻辑连接符 |
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54. | logical grammar |
| 逻辑语法 |
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55. | logical data base |
| 逻辑数据库 |
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56. | logical equivalence |
| 逻辑等价 |
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57. | logical deduction |
| 逻辑演绎 |
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58. | logical file maintenance |
| 逻辑文件维护 |
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59. | logical descriptor |
| 逻辑描述符 |
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60. | logical implication |
| 逻辑隐含 |
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