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21. | almost periodic differential equation |
| 概周期微分方程 |
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22. | approximate contour lines |
| 等高线概位 |
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23. | method of scheme |
| 概型法 |
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24. | probable error of index |
| 指数概差 |
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25. | reconnaissance soil map |
| 土壤概图 |
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26. | Filled with a thousand regrets |
| 感概万千 |
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27. | generalized soil survey |
| 土壤概查 |
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28. | probable error of coefficient of correlation |
| 相关系数概差 |
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29. | generalizing assimilation |
| 概识同化 |
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30. | skeleton diagram |
| 概略图|总图 |
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