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61. | negative substituent |
| 阴性取代基 |
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62. | allylic substitution |
| 烯丙取代 |
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63. | aromatic substitutio |
| 芳族取代 |
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64. | None can take the place of you. |
| 无人能取代你。 |
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65. | olefin(e)-substituted aromatic |
| 烯烃取代芳香烃 |
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66. | chain substitution |
| 链上取代 |
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67. | alien substitution line |
| 外来取代品系 |
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68. | directing group |
| 定向取代基 |
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69. | side substitution |
| 侧链取代 |
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70. | double replacement |
| 双重取代|互换 |
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