不完全的燃烧和不适当的通风条件能导致乙炔的产生.Incomplete combustion and improper draft conditions can cause ethylene formation.这种反应构成了制备芳基环丙基乙炔的有效方法.This sequence constitutes an efficient method for preparing arylcyclopropylacetylenes.丙二烯是甲基乙...