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...
我们的飞机摇摇晃晃地飞过巴拿马中部地区。We had a bumpy flight over the centre of Panama.该方案主要的受益者是北部和中部地区的人们。The scheme mostly benefits people in the North and Midlands.我们随后朝西前往波兰中部。We then headed west towards the heartland of Poland....
It was feared they could break the Allies' codes.恐怕他们会破译盟军的密码。A generation ago genetic codes were certainly unknown.遗传密码在上一代确实很少有人知道.There are many ancient codes and records in the library of our institute.在我院图书馆里藏有...
The accounting firm deliberately destroyed documents to thwart government investigators...会计事务所故意毁坏文件，阻挠政府调查工作。The new credit cards have many features which are designed to thwart forgers.新的信用卡有许多特徵,是设计用来防止伪造的.The Everto...