这一聚合物的性质目前是个商业机密。The nature of the polymer is currently a trade secret.聚合物及类似材料的价格会下降。The prices of polymers and suchlike materials will decrease.接著我们致力于找出能够减弱辐射的聚合物.Then we got involved with trying to find polymers that...
Hydroquinone is an important chemical material and intermediate in industrial chemistry.对苯二酚是一种重要的化工原料和中间体.Market prospect and production methods for pyrocatechol and hydroquinone are reviewed.概述邻苯二酚、对苯二酚的市场前景、生产方法.Antio...
她慷慨激昂地朗诵了这出戏中著名的开场白。She declaimed the famous opening speech of the play.说了几句开场白之后，他即宣布优胜者名单。After a few preliminary remarks he announced the winners.她的开场白十分风趣。She opened the speech with a real zinger....