Some commercial laboratories use periodic nitrate tests as guides.许多商业性的试验室已应用定期的硝态氮分析作为指导.In the presence of ethanonitrile and glycol, anisole reacts with ammonium ceric nitrate to form o - nitroanisole.在乙腈、聚乙二醇存在下, 用苯甲...
A sense of impending doom came upon all of us.我们所有人都有一种大难临头的感觉。Against a background of impending famine, heavy fighting took place.即将发生饥荒之时, 严重的战乱爆发了.The king convoke parliament to cope with the impending danger.国王召开国会以应...
Wind caught the sudden puff of dust and blew it inland.风猛地刮起一阵灰尘，将它吹往内陆。He took a puff on his pipe and shook his head.他抽了口烟斗，摇了摇头。Can I tempt you with a little puff pastry?我能给你尝点泡芙点心吗？...
The subhuman conditions of work soon caused physical deterioration.非人的工作环境不久就导致了身体状况的恶化。He was finally forced off the political stage last year by the deterioration of his physical condition...他最终因身体状况恶化被迫于去年离开了政治舞台。The ...