METHODS: The target compound was prepared by the bromination and amination reaction.方法: 用溴代及胺化反应合成了四甲基吡嗪衍生物.The effects of triacetoneamine concentration on hydrogenation and amination were discussed.论述了三丙酮胺纯度对加氢和还原胺化反应的影...
The more recent conifer plantations cannot yet compare with the old woodlands.年代较近的针叶树林场还比不上年代久远的林场。In conifer orchards new stumps should be removed.在针叶树的种子园,新的伐桩应予除掉.Conifer tree style such as pine, fir, spruce, redwood...
火星的大气层中只含有极少量的水。The Martian atmosphere contains only tiny amounts of water.这种机器使用极少量的臭氧为食品冷藏车消毒杀菌和去除异味。The machine uses minute quantities of ozone to sterilise and deodorise refrigerated food vehicles.新鲜脂肪包含脂肪酸的甘油酯和极少量的自...
The Foundation is holding a dinner in honour of something or other...基金会正举办某个纪念宴会。Mills have iron pillars all over the place holding up the roof.工厂里四处都立有铁柱支撑着房顶。We stood in a circle holding hands.我们站成一圈，手牵着手。They felt th...
Once more he smiled, remembering a certain Mid - Autumn Festival.一想起那一年 中秋 佳节,他不禁漾出笑容.The Mid Autumn Festival is drawing near.中秋节快到了.Well, there are Dragon Boat Festival, Mid - autumn Festival , Chung Yeung Festival and ...