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| 51. | The condition of being in action; operation. |
| 力量；作用发生作用的状况；作用，效力 |
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| 52. | carbonization, carbonizatio |
| 炭化[作用];碳化[作用] |
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| 53. | proportional action;P-actio |
| 比例作用；P-作用 |
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| 54. | Only certain discrete frequencies are left without benefit of external stabilization due to the feed system. |
| 只有某些个别的频率没有利用供应系统的外部稳定作用。 |
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| 55. | scouring action |
| 冲刷作用;扫清作用 |
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| 56. | "In many developing countries, microwave radio-relay systems play the key role in the networks. It is quite logical because the microwave system has the following features:" |
| 在许多发展中国家，无线微波系统在网络中起着重要的作用，因为微波系统有以下特点: |
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| 57. | abrasion (corrasion) |
| 磨蚀〔作用〕；刻蚀〔作用〕 |
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| 58. | In many systems of permanent subsistence agriculture, domesticated animals play an important role. |
| 在许多固定的自给农业系统中，家畜起着重要的作用。 |
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| 59. | The motion that results when forces act on a material system depend also on mass distribution in the whole system. |
| 物体系统受到力的作用所产生的运动也取决于在整个系统中的质量分布。 |
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| 60. | China has been playing an active role in UN women's organizations. |
| 中国在联合国系统的有关妇女机构中发挥了积极的作用。 |
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