他的辅导教师发现了他在阅读和写作方面进步的迹象。His remedial teacher sees signs of progress in his reading and writing.公司在降低成本方面付出了艰苦卓绝的努力。The company has made heroic efforts at cost reduction.据说为研究和技术方面提供的经费严重不足。Research and technology are sai...
芳基取代聚炔及其衍生物呈现出光电磁等许多新颖的性能.Aryl substituted polyacetylenes and their derivatives exhibit a lot of novel optical , electric, magnetic properties.目的: 建立中药北沙参中聚炔法卡林二醇的薄层扫描测定方法.Objective : To establish TLC scanning method for...