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81. | modified steamflood |
| 改进的蒸汽驱 |
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82. | improve public morals |
| 改进公众道德 |
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83. | The improvement was rapid. |
| 改进甚为迅速。 |
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84. | PIP (Product Improvement Program) |
| 产品改进计划 |
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85. | an immense improvement |
| 巨大的改进 |
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86. | method improvement program |
| 方法改进程序 |
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87. | an observable improvement |
| 看得出的改进. |
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88. | matrix modifier |
| 基体改进剂 |
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89. | the reform of teaching methods |
| 教学法的改进 |
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90. | invention of improvement |
| 改进性发明 |
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