在环己烯环氧化反应中, 以氯仿和叔丁醇为溶剂时,环氧化反应的结果最好.In the epoxidation, chloroform and t butanol gave the best results.氢气还原活化效果明显优于环己烯还原效果.The deoxidization effect with hydrogen was superior to that with cyclohexene.我们曾研究了8-甲氧基呋喃并[3′,2′∶...
Magnesium hydroxide particles were synthesized via decomposition of hydrosulfide compound followed with hydrothermal treatment.以工业氯化镁和硫氢化钡为原料,采用复分解法合成高纯氢氧化镁.There are also some estimates of the efficiency of litter decom...
He joined the consular service, chiefly because this was one of the few job vacancies...他到领事馆工作，主要因为那是仅有的几个空缺职位之一。A usually coarse - grained igneous rock composed chiefly of calcic plagioclase and pyroxene.一种辉石矿物,由锂铝硅酸盐组...
A skeleton staff of 20 is being kept on.留下了20名骨干人员。The skeleton consists of differently shaped bones held together by ligaments.人体骨架是由依靠韧带连接的形状相异的骨头构成。Only a skeleton staff remains to show anyone interested around the si...
Now and then they heard the roar of a heavy truck.他们不时地听到大卡车的轰鸣声。Now and then I referred a client to him.我不时地介绍客户给他。Stir the batter every now and then to keep it from separating.不时搅动面糊，防止其成分散开。...