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| 41. | Total Dependency Ratio |
| 瞻养比率 |
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| 42. | hydraulic ratio |
| 水力比率 |
|
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| 43. | selection ratio |
| 选择比率 |
|
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| 44. | propagation ratio |
| 传播比率 |
|
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| 45. | nucleoplasmic ratio |
| 核质比率 |
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| 46. | ratio of cations |
| 阳离子比率 |
|
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| 47. | risk-benefit ratio |
| 危险比率 |
|
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| 48. | enrolment ratio |
| 入学比率 |
|
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| 49. | ratio indicator |
| 比率指示器 |
|
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| 50. | input-output ratio |
| 投入产出比率 |
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