This paper advances the preparation method of erucamide by direct ammonolysis of rape oil. sol - vent crystallization.本研究提出菜籽油直接氨解、溶剂脱脂、蒸馏预分离、溶剂结晶提纯制取芥酸酰胺的方法....
总的来说，当今的老年人依然相对贫困。As a group, today's old people are still relatively deprived.每年我们都有慈善日来筹款帮助贫困人群。Every year we have charity days to raise money for unfortunate people.贫困、文盲与高出生率密切相关。Poverty and illiteracy go togeth...
他粗犷豪放，给人一种特殊的感觉。He possessed a raw energy allied to a feeling of something special.有时，问题儿童被放在特殊的学校。In some cases a problem child is placed in a special school.大约6万用户拥有特殊的适配器来接收和转换信号。About 60,000 subscribers have special ...