I was dismayed at the news.我听到这个消息,很沮丧。The thought that she might fail the history test dismayed her.想到历史可能考不及格时, 她很沮丧。The committee was dismayed by what it had been told...委员会对所告知的一切很是惊愕。He was dismayed to find that his...
In the reaction of acetylation and nitration 1,2 ? dichloroethane was used as solvent.在乙酰化、硝化反应中引入了1,2-二氯乙烷溶剂.Polyurethane demulsifier for crude oil were prepared from polypropylene glycol, xylene, toluenediiso - cyanate...