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| 71. | service to science |
| 对科学的贡献 |
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| 72. | unpaid contribution (of the work of women) |
| 无报酬的贡献 |
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| 73. | service to the cause of education |
| 对教育事业的贡献 |
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| 74. | primary aberration contribution |
| 初级像差贡献量 |
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| 75. | Then contribution can be calculated as following... |
| 边际贡献计算如下… |
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| 76. | service to the State |
| 对国家的贡献 |
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| 77. | unit contribution margin |
| 单位贡献毛益 |
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| 78. | make a substantial contribution |
| 作重大的贡献 |
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| 79. | net profit vs contribution margin |
| 净利对边际贡献 |
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| 80. | Whoever contributes nothing directly or indirectly to production, is an unproductive consumer. |
| 谁对生产既没有直接贡献也没有间接贡献，谁就是非生产性消费者。 |
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