碳的诸多同位素the many isotopes of carbon碳的化合价是4价。Carbon has a valency of 4.通过环氧化和氧化就得到外消旋的含十八个碳的昆虫返动激素.Epoxidation and oxidation gave the racemic C 18 - juvenile hormone....
一种混合计算机级,其指令既由操作系统解释,也直接由微程序解释.An instruction for operations at a level lower than machine instructions.微程序控制器的功能、组成知识.Micro - program controller of the function and composition of knowledge.在用毫微程序设计的计算机中, 组成毫微程序的基本语句单位....
His courage beggars description.他的胆量无法用语言来形容。To give money to beggars sometimes amounts to encouraging begging.给乞丐钱,有时就等于鼓励行乞.Let beggars match with beggars.龙配龙,凤配凤....
...the mood of economic defeatism.经济失败主义的情绪I can think of no greater expression of defeatism.我想,这是我听到的最悲观的失败主义论调了.We have beaten back despair and defeatism.我们已战胜了绝望情绪和失败主义.Pessimism is the eastest way of self defeatism.悲...
The prince vituperated against the developers for ruining London's skyline.王子斥责土地开发商破坏了伦敦市建物映在空中的轮廓线之美.The skyline of domes and minarets was imprinted on my memory...天空中穹顶与尖塔的轮廓深深刻在了我的记忆中。The sea and the skyline ble...
粘结剂对纤维的集束性能是必需的.A binder is necessary for strand integrity.在混凝土中水泥是粘结剂.Cement is the bond in concrete.对所有粘结剂粘结的首先要求,就是必须能浸润基材.The first requirement for any adhesive bond is that the adhesive most wet the substrate....