METHODS: The target compound was synthesized from N - benzyl protected aminoacetophenone through hydrogenation, benzoylation and reduction. 方法: 以氮 - 苄基保护胺基酮为原料,经氢化, 苯甲酰化,还原三步合成双苯甲酰沙丁胺醇酯.
机群将被迫在国际空域飞行.The squadron would be forced to keep to international skies.夹带率应几乎随自由空域高度成指数递减.The entrainment rate should closely decrease exponentially with freeboard height.该空域用雷达扫描以便发现敌机踪迹.The area was scanned for signs...
He impersonates all the well - known politicians exactly right.他模仿所有有名的政治家达到维妙维肖的地步.Dr. Norman Bethune impersonates the spirit of proletarian internationalism.白求恩医生体现了无产阶级国际主义精神.He an entertainer who impersonates celebri...
钙通过尿液和粪便排出体外。Calcium is excreted in the urine and stools.幼虫会连同粪便排出.The larvae may be excreted in the faeces.粪便含氮，而正是氮可以肥化荒芜的土地。The faeces contain nitrogen and it is that which fertilises the desert soil....
PCZ produces medium adsorber to have very large latent capacity as reactor.PCZ作为反应堆生产中的吸附器具有很大潜力.Up to now it is impossible to prevevt the sulfation from the NO 2 adsorber completely.到目前为止,也不可能使NO_4吸附器上完全无硫酸盐生成....