R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.蒸馏得质量分数高于98%的邻乙氧基苯甲酸,收率为92%.Distillation gave o ethoxybenzoic acid with 98 % of the p...
我们用一张摆放得很巧妙的椅子将它隐藏了起来。We had kept its presence hidden with a strategically placed chair.这是个设计巧妙的骗局。That's a cute trick.当时得采取一些巧妙的政治手段以挽回局势。It was going to take some deft political footwork to save the situation....
没人觉察出他所承担的痛苦。No one suspected the anguish he carried on his shoulders.我能觉察到有什么事很不对头。I could see that something was terribly wrong.普罗斯特已经觉察到可能会发生什么事。Prost had sensed what might happen....
Where are you going in that rig-out?你穿着那身打扮要去哪里？The severe conditions hampered attempts to pull the vessel free of the rig.恶劣的天气情况使得把那艘船拉离钻塔的努力很难奏效。They rig their domestic markets in favour of local businesses.他们操纵国内市场以使...
The structure, the principle of work, bauxite floatation of BF - L floatation machine were presented.本文介绍了BF -L 型浮选机的结构特点, 工作原理及铝土矿选矿的适应性研究.B factor ( BF ) in thyroid function hyperfunction sickness blood serum content a...