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71. | indicator of demographical trend |
| 人口趋势指标 |
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72. | trend correction method |
| 趋势修正法 |
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73. | upward trend analysis |
| 向上趋势分析 |
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74. | differential trend surface |
| 差异趋势面 |
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75. | an inclination to grow fat |
| 长胖的趋势 |
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76. | error of central tendency |
| 中心趋势误差 |
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77. | ecogeographical divergence |
| 生态地理趋势 |
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78. | linear time trend |
| 线性时间趋势 |
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79. | equivalent trend line |
| 当量趋势线 |
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80. | comparison among means for trend |
| 平均趋势比较 |
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