Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts.大多数连于芳核能被直接取代的基团仅限于重氮盐.Severe steric effects at the reactive carbon would impede the substitution.大的立体效应阻止在碳上的取代.We use saccha...
See if you can nail the chairman down to an exact date.看你能不能迫使主席把准确日期定下来。The main events were as follows: first,the president’s speech,secondly,the secretary’s report and thirdly,the chairman’s summing-up.主要活动如下:第一项,总裁讲话...
Neither side would have an incentive to start a war. Ergo, peace would reign.双方都不会有开战的动机，所以将会是和平时期。Ergo, these facilities have been marked as the likely rail transfer points.因此, 这些地方也已经被标示为可能的铁路转运点.And, ergo, his buddy i...
This page is cached.这一页存入高速缓冲存储器了。Your PHP scripts are recompiled every time unless the scripts are cached.除非脚本可以缓存,否则每次调用时都会重新编译一次.Your search terms are highlighted on the cached version.搜索词在网页快照中突出显示....
Whereas gasoline fumes linger close to the ground before dispersing.而汽油烟气却靠近地面迟迟不散.Emulsification: Dispersing of water into another liquid such as oil.乳化: 水分散布于其他液体,如油类内的情况.The oil appeared to be dispersing...油好像在扩散。It i...
我做挤压管生意。I work in the extruded tube business.盛怒之下, 他用膝盖挤压那人的肚子.In anger, he ground his knee into the man's stomach.塑料从细孔中挤压出来形成纤维.Plastic material is extruded through very small holes to form fibres....