Grave fears are felt for the safety of the missing airman.对失踪飞行员的安全甚为担忧....an English airman.英国飞行员We worry about the safety of the missing airman.我们对失踪飞行员的安全甚为担忧.The airman boldly jumped from the airplane with his parach...
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....
Ronald Barnett , The Idea of Higher Education , Open University Press, 1990, p .165.转引自汉伯里·布朗:《科学的智慧》, 李醒民译, 辽宁教育出版社1998年版,第136页.Steven Barnett's late surge helped him to win a bronze for Australia.史·巴尼特迟来的发挥,使他最终为澳...