This preparation uses dialkyl imidazole salt, alkyl pyridine salt or caprolactam and fatty acid as reactant.该方法使用带有二烷基咪唑盐 、 烷基吡啶盐或者己内酰胺和脂肪酸作为反应物.Thus the term dialkyl carbonate includes, for example, methyl ethyl carbona...
Diaryl nitroxides are even more stable than the dialkyl nitroxides.二芳基氮氧化物自由基比二烷基氮氧化物自由基还要稳定.The immediate products of this reaction are alkali - metal derivatives of dialkyl phenylmalonates.此反应得到的产物为二烷基苯基丙二酸酯的碱金属盐衍生物.Th...
It'snows in winter so I can make a snowman.冬天下雪,所以我可以堆雪人.We can make a snowman on a snowy day.在下雪天,我们可以堆雪人.Because I like to play in the snow and make a snowman.因为我喜欢在雪地里玩耍和堆雪人....
我不知道如何使用同温层观察镜。I don't know how to use the stratoscope.关于同温层中的粒子这一问题将另行讨论.The subject of stratospheric particles will be discussed separately.两类物质分别在同温层和对流层氧化降解.Chlorofluorocarbons and hydrochloroflorocarbons are ox...
This puts the cart before the horse; elections should follow, not precede, agreement on a constitution.这样做是本末倒置；选举应该在宪法确定之后举行,而不是之前。The politicians who lost the elections will be consigned to the dustbin of history.落选的政客...
Foreign Newscast is on Page 16.国外新闻在第16版。An anchor coordinates a newscast in which several correspondents give reports.新闻节目主播在新闻节目中综合整理若干记者的报导.To narrate or coordinate ( a newscast ).主持叙述或协调 ( 新闻广播节目 )...