The ability of clay minerals to catalyse decarboxylation has long been recognised.粘土矿物能催化脱羧基作用是早已认识到的问题.The results demonstrate that this catalyse has an excellent activity and selectivity this reaction.结果表明该催化剂对此合成反应具有很...
The inditing experiments of searching - root writers and the attempts of avant - grade authors embody these two aspects.这两个层面又集中体现在寻根派作家的创作实践与先锋作家群的尝试中.Network literature has definite appreciating values , meanwhile, it ...
My son is an apprentice in a furniture maker's workshop.我的儿子在一家家具厂做学徒.We shut off the motor before we left the workshop.我们离开车间以前把马达关掉了.Five young workers have been assigned to our workshop.拨了5名青年工人到我们车间....