Diacetone acrylamide ( DAAm ) was prepared by reacting acrylonitrile with diacetone alcoholammonia.以二丙酮醇和丙烯腈为原料,利用简便、温和的反应条件合成新型乙烯基功能单体-双丙酮丙烯酰胺.Crosslinkable acrylic polymer emulsion was obtained by adding acrylic polyme...
无标志的预约型出租车沿街拉客是非法的。Minicabs are prohibited by law from touting passers-by for business.里韦罗警官说因为沿街乞讨而被捕的事情每天都有。Sergeant Rivero says arrests for panhandling take place every day.这辆车疯了一般沿街疾驶。The car was barreling down the s...
Hello, this is John Thompson.喂，我是约翰·汤普森。I owe a debt of thanks to Joyce Thompson, whose careful and able research was of great help.我要衷心地感谢乔伊斯·汤普森先生，他严谨而卓著的研究给予了我极大的帮助。Daley Thompson was a great athlete.戴利·汤普森是位著名的运动员。...
We are seeking continuous, incremental improvements, not great breakthroughs.我们在寻求持续的、渐进的改善，而不是重大的突破。Exciting artistic breakthroughs have recently occurred in the fields of painting, sculpture and architecture.绘画、雕塑和建筑领域...