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....
Shagou deposit mainly lies in the metamorphic rock of Taihua Group, Archaeozoic erathem.本矿床主要的赋矿地层为新太古界太华群高级变质岩.Buried hills of Archaeozoic, Paleozoic and Mesozoic Eras developed well in the west part of Dongying Depress...
狄喇克的理论还预言有一种质子的姐妹粒子,带负电荷, 叫做反质子.Dirac's theory also predicted a negatively charged sister for the proton, called the antiproton.你将需要100000个Fermilab制造出的反质子才能够点燃一盏灯.You would need 100,000 Fermilabs to power a single l...
Mayors wear chains round their necks as badges of office.市长们戴着象征职位的项链.Badges are also available at a cost of £2.50.徽章也有卖的，2.5英镑一枚。Nowadays badges are stamped out of gunmetal.现在徽章是用模具从炮铜中冲压出来的.The stewards' badges ar...