London Underground said it may have to axe 500 signalling jobs because of government cutbacks in its investment.伦敦地铁称由于政府削减了投资，可能将不得不削减500个信号员的岗位。The cutbacks are justifiable on the grounds of cost.削减符合成本方面的考虑.cutbacks i...
它的红外光谱与樟脑硝亚胺红外光谱相似.Its IR spectrum compared with that of comphor nitrimine.亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process.合适的有机亚胺反应剂具有多种组成和结构.The suitable organic imine react...
I can't bring myself to ditch him and start again.我不忍心蹬掉他再觅新欢。Below the bridge we could just discern a narrow, weedy ditch.我们仅能依稀辨出桥下一条杂草丛生的窄沟。She underwent a heart transplant in a last-ditch attempt to save her.她动了...
The camshaft rotates in phase with the crankshaft, but at half its speed.凸轮轴和曲轴协调旋转, 但速度仅是曲轴的一半.Since 1958, an engine with a single overhead camshaft has been used.从1958年起, 便已使用带有单顶置凸轮机的发动机.In the engine, oil is supplied...