在许多情况下异氰酸酯同水, 醇和胺发生猛烈的反应.In many instances isocyanates react vigorously with water, alcohols, and amines.这类含氮化合物的例子是咪唑, 三聚氰酸三酰胺, 三聚氰酸一酰胺.Examples of such nitrogenous compounds are imidazole, ammeline, ammelide.六亚甲基二异氰酸酯 ...
这是一本关于地名的词典.This is a dictionary of place name.凡本书提及的人名、地名均编入索引.All persons and places mentioned in this book are indexed.你可以查地名字典.You can consult a dictionary of place names....
It was snowing hard by then.当时雪下得很大。After it had stopped snowing, we all went sledging.雪停了以后我们全去坐雪橇玩.Ordinarily It'should be snowing at this time of the year.按说这时候该下雪了....
The material is readily prepared by reaction of formaldehyde and hydrazine.这种物质很容易由甲醛和肼反应而得到.Examples of such fuels are monomethyl - hydrazine and diborane.这种燃料的例子是一甲肼和二硼烷.Hydrazine perchlorate and lithium perchlorate fo...