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...
He was found guilty of forgery.他被判伪造罪名成立。Experts are dismissing claims that the painting is a forgery.专家排除了这幅画是赝品的说法。The painting was a forgery.这张画是赝品....