一种是通过生成环状正离子中间体进行的，通过这样的历程进行的加成反应是反式加成。
One is conducted amidst formed cyclic cation intermediate and the reaction thus carried out is known as anti- form addition.
一种是通过生成环状正离子中间体进行的，通过这样的历程进行的加成反应是反式加成。
One is conducted amidst formed cyclic cation intermediate and the reaction thus carried out is known as anti- form addition.
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