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| 61. | eletronegative substituent |
| 电负性取代基 |
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| 62. | chain substitution |
| 链上取代 |
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| 63. | negative substituent |
| 阴性取代基 |
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| 64. | tetra substitution product |
| 四取代产物 |
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| 65. | directing group |
| 定向取代基 |
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| 66. | disubstitution product |
| 双取代物 |
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| 67. | None can take the place of you. |
| 无人能取代你。 |
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| 68. | elimination of group |
| 消去取代基 |
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| 69. | double replacement |
| 双重取代|互换 |
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| 70. | substituent effect |
| 取代基效应 |
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