After it was mixed with epoxy resin, transition state was formed first. Then they got on with opening ring reactions according to bimolecular nucleophilic substitution mechanism (SN2).
它与环氧树脂混合后首先形成过渡状态，然后按双分子亲核取代(SN2)机理进行开环反应。
The transition state plays an important role in mechanism research of chemical reactions, but it is hard to determine experimentally.
化学反应过渡态结构对化学反应机理的研究有重要作用，但实验上无法直接得到。
Secondly, a Hop-by-Hop State-Transition-based mechanism for rate adjustment (HSTRAM) is presented.
然后，提出一种逐跳的状态转移速率调节机制（HSTRAM）。
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