She described the distribution of food and medical supplies as a logistical nightmare.她把分配食物和药品的工作说成是组织管理上的噩梦。Organizing famine relief presents huge logistical problems.筹画馑救济工作在后勤方面困难极大.Logistical problems may be causing...
在剧院里，他们正在演出比才的作品《卡门》。Inside the theatre, they were giving a performance of Bizet's Carmen.乔恩主演剧中最引人入胜的剧集之一。Jon featured in one of the show's most thrilling episodes.这部剧直到阿申巴赫堕入情网后才真正开始精彩起来。The play only really ...
The hydroxyl groups can be changed into esters , ethers , acetals and ketals, etc.最常用的羟基保护基可归纳为三类:酯类 、 醚类和缩醛或缩酮类.Eight acetals ( Ketals ) were synthesized under the optimal conditions.在最佳条件下,合成了八个缩醛 ( 酮 ) 化合物.The yields ...