They had five centuries of domination by the Romans.他们被罗马人统治了5个世纪。When they conquered Britain, the Romans brought this custom with them.古罗马人征服英国的时候也带来了这个风俗。Lettuce was grown by the Ancient Romans.古罗马人最先种植莴苣。...
In addition to the dirty of volatile solvents, to airproof.不兴不净剂洋的溶剂难挥发, 给夺目密封.It has good endurance against grinding, aging and good airproof performance.具有良好的耐磨性 、 耐老化性和气密性.Water - cool homogenizing airproof structure ...
以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸高铈为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl butyrate was synthesized by using ceric sulfate as the catalyst.以硫酸铈铵为催化剂,...
My overriding concern is to raise the standards of state education.我最关心的是提高国民教育水平。Development is of overriding importance.发展是硬道理The conquest of inflation has been the Government's overriding economic priority for ne...