以正庚醛 、 硫代硫酸钠和溴代正丁烷为原料,合成了正庚醛正丁硫醇缩醛.The heptanal butyl mercaptan was synthesized with heptanal, sodium thiosulfate and 1 bromobutane as raw materials.目的研究以庚醛和原甲酸三乙酯为原料制备庚醛二乙缩醛的工艺条件.Aim Enanthal diethyl acetal is prepared ...
尽管他身形庞大，移动起来还是很灵巧。Despite his bulk he moved lightly on his feet.这个炉子底下带轮子，很容易四处移动。The stove is on wheels so it can be shuffled around easily.大多数移动机器人仍处在设计阶段。Most mobile robots are still in the design stage....
He is cagey about what he was paid for the business.他对自己在这桩买卖中所得的报酬不愿多提。Tony is very cagey about his family.托尼对自己家的事讳莫如深。The cagey fox could not be easily trapped by the farmer.那只狡猾的狐狸不会轻易落入农夫的陷阱....
The approximate date of his departure is next month.他大约在下个月动身.They did not have even an approximate idea what the Germans really wanted.他们完全不清楚德国人真正想要什么。His description of what happened approximate d to the truth, but he...