其金属取代物能和环戊酮顺利地反应得到40.Its metallation and addition to cyclopentanone proceeded well to 40.以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.比较研究了三种含苄叉环戊酮基团的新型香豆素类光敏染料.Absorption spect...
At last, some suggestions were raised for the concrete backfill mining.最后对具体的充填开采方法提出了建议.This article is good for promotion of backfill.本文对充填技术的推广,具有一定的参考价值.The upward drift stoping with backfill is a mining method with ...
The engineer and his son held frequent consultations concerning technical problems.工程师和他的儿子经常就技术问题互相征求意见。We should like to know: what was the nature of these consultations?试问,这都是些什么性质的协商?These rates do not include the ch...
每天晚上他都准时回家吃饭, 觉得家里的小餐室可爱之极.Each evening he arrived promptly to dinner, and found the little dining - room a most inviting spectacle.主营产品: 酒吧凳子, 椅子, 小餐室的餐桌和椅子, 厨房凳子, 和木制凳子等家具.Product Information: Bar Stools, Chairs, Dinet...
Dextrose solutions are useful for providing water.葡萄糖液可用来供给水分.In fermentation, dextrose is changed to alcohol ( C 2 H 5 HO ) and carbon dioxide ( CO 2 ).发酵过程中, 葡萄糖变成洒精 ( C2H5HO ) 和二氧化碳 ( CO2 ).Dextrose is a stabilizer, a...
...parents whose political views were nurtured in the sixties...政治观点形成于60年代的父母一辈He had three children, and lived on into his sixties.他有3个孩子，已经60多岁了。Kiefer was just one of the artists who had studied under Beuys in the ea...