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11. | gradation period |
| 均夷相 |
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12. | Gradation Curve |
| 级配曲线 |
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13. | optimum gradation |
| 最佳级配 |
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14. | textural gradation |
| 结构均夷作用 |
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15. | streaming gradation |
| 河流均夷作用 |
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16. | mechanical gradation |
| 筛别分析 |
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17. | tonal gradation |
| 音调等级 |
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18. | gradation compositio |
| 级配组成|配合成分 |
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19. | vowel gradation |
| 元音递变 |
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20. | reproduction of gradation |
| 阶调复制 |
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