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| 91. | dual modulation |
| 双重调制 |
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| 92. | doubly excited state |
| 双重激发态 |
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| 93. | dual exchange rate |
| 双重汇率 |
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| 94. | duplex equipment |
| 双重设备 |
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| 95. | twofold classification |
| 双重划分 |
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| 96. | conflicting loyalties |
| 双重效忠 |
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| 97. | Double Balanced mixer |
| 双重平衡混频器 |
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| 98. | dual-control column |
| 双重控制杆 |
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| 99. | Two-tier system; Double-track system |
| 双重机制 |
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| 100. | dual amplification |
| 双重放大 |
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