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41. | ratio indicator |
| 比率指示器 |
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42. | extinction ratio |
| 消减比率 |
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43. | segregation ratio |
| 分离比率 |
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44. | Total Dependency Ratio |
| 瞻养比率 |
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45. | hydraulic ratio |
| 水力比率 |
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46. | risk-benefit ratio |
| 危险比率 |
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47. | selection ratio |
| 选择比率 |
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48. | ratio of cations |
| 阳离子比率 |
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49. | nucleoplasmic ratio |
| 核质比率 |
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50. | enrolment ratio |
| 入学比率 |
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