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| 81. | be kept upright |
| 保持正直 |
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| 82. | keep one's rank |
| 保持地位 |
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| 83. | keep one's resolve |
| 保持决心 |
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| 84. | maintenance of airworthiness |
| 保持适航性 |
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| 85. | keep quality up |
| 保持质优 |
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| 86. | hold acknowledge |
| 保持应答 |
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| 87. | Preserve Modifier |
| 保持修改器 |
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| 88. | maintenance of accuracy |
| 保持精确度 |
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| 89. | observe a silence |
| 保持静默 |
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| 90. | maintenance of fertility |
| 肥力保持 |
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