名词
中文翻译：偕同取代
同义词：
['co-substitution', 'co-exchange', 'co-metathesis']
例句：
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1. In the studyof allylic substitution, the reaction mechanism is still not fully understood.
在研究偕同取代时，反应机理仍然不完全理解。
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2. The researchers found that the allylic substitution could lead to a significant increase in yield.
研究人员发现偕同取代可以导致产量显著增加。
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3. The process of allylic substitution has been widely used in the production of organic compounds.
偕同取代过程在有机化合物的生产中得到了广泛应用。