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| 81. | mean temperature difference |
| 平均温差平均温差 |
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| 82. | efficiency average |
| 平均生产率;平均效率 |
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| 83. | mean utilization |
| 平均利用系数|平均负荷 |
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| 84. | mean tide level |
| 平均潮面平均潮面平均潮位 |
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| 85. | average candle power |
| 平均发光强度|平均烛光 |
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| 86. | average net profit |
| 平均纯利润;平均净利润 |
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| 87. | average grain size |
| 平均粒度;平均粒径 |
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| 88. | Average sample |
| 平均选样，平均样品 |
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| 89. | average rate of increase |
| 平均递增率;平均增长率 |
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| 90. | An imperceptible drop in temperature. |
| 难以觉察的气温下降 |
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