硝胺醚在无烟火药成份中有两种作用.The nicramine ethers perform two functions in the smokeless powder composition.结果表明,聚乙二醇缩水甘油醚对丝胶蛋白具有明显的交联作用.The result showed that polyethylene glycol diglycidyl ether cross linked sericin obviously.在最佳条...
These are rings of 18 and 24 karat gold.这些是18K和24K金的.This necklace of mine is not very expensive, it is 18 - karat gold.我这个项链不太贵, 是18开金的.Gold jewelry of 10 K or more will have a karat stamp.含金量为10K或者高于10K的黄金饰品上将会有K金标志....
By the 1930s the wristwatch had almost completely supplanted the pocket watch.到了 20 世纪 30 年代,手表几乎完全取代了怀表。He glanced at his wristwatch. 'I suppose we'd better make a move.'他看一眼手表说:“我想我们最好动身吧。”He has a very ...
The water in the irrigating ditch was well up.灌溉渠里涨满了水.The ditch was so broad that no animal can hop it.没有动物能跃过这么宽的一条沟。A ditch diverted water from the rill into the fields.一条沟渠把水从河里引向田间.The carriage upset and we were all...
The goal of the experiment was to familiarize the people with the new laws.试行的目的就是要让人们熟悉新法规。He tried to familiarize himself with the use of the new fool.他努力熟悉新工具的使用.You must familiarize yourself with the rules before pla...