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21. | take one's place; take one's position |
| 取代..人 |
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22. | substitution product |
| 取代产物 |
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23. | substitutive name |
| 取代名称 |
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24. | mercury replacement |
| 汞取代 |
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25. | alkyl substitution |
| 烷基取代 |
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26. | take the place of; replace |
| 代替;取代 |
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27. | substitution reaction |
| 取代反应 |
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28. | anomalous substitution |
| 反常取代 |
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29. | edge substitution |
| 边缘取代 |
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30. | substituting effect |
| 取代效应 |
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