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| 21. | effectiveness audit |
| 经济效益审计 |
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| 22. | economic efficiency of commecial enterprises |
| 商业企业经济效益 |
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| 23. | economic benefit of transportation |
| 运输业经济效益 |
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| 24. | This technology not only has high safty and economic efficacy, but also has social efficacy of protection underground water resource. |
| 该技术不仅具有极高的安全效益和经济效益,同时具有保护地下水资源的社会效益。 |
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| 25. | ecological economic benefit |
| 生态经济效益 |
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| 26. | economic benefits of irrigation |
| 灌溉经济效益 |
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| 27. | socialist economic effectiveness |
| 社会主义经济效益 |
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| 28. | The activated carbon which can be rejuvenated by roasting procedures has improved the economy considerably. |
| 已证实研制通过煅烧可再生的活性炭具有相当大的经济效益。 |
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| 29. | economic benefits of drainage |
| 排水经济效益 |
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| 30. | economic benefit in agricultural production |
| 农业生产的经济效益 |
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