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...
Hardy has often been criticised for an excessively pessimistic view of life.哈代由于对生活持过度悲观的态度而常常受到批评。The Norwegian Elkhound is a hardy gray hunting dog.挪威猎麋犬是一种勇敢的灰色猎犬.Reflections on Thomas Hardy's " Wessex Novels " f...