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...
20世纪30年代西部的产出有所减少。There was a slackening of western output during the 1930s.宾夕法尼亚西部的电话区号是412。The area code for western Pennsyl-vania is 412.他一向热爱西部的迷人风光。He had always been in love with the enchanted landscape of the West...
Any of various small freshwater fishes of the family Cyprinidae, which also includes carps and minnows.鲤科小鱼或其它小的淡水或咸水鱼(尤其是鲱鱼);通常整条鱼烹饪.These carps are very big.这些鲤鱼很大.Carps live in fresh water.鲤鱼生活在淡水里.White - bellied , b...