When he came to and raised his head he saw Barney.他苏醒过来，抬起头，看见了巴尼。He heaved Barney to his feet.他拉巴尼站了起来。I'll pround it that Barney's managing properly.我敢打赌,巴尼的做法一定很稳当....
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...