Limonene needed in recycling foamed polystyrene was extracted from the ear of schizonepeta tenuifolia using ligroin.本文研究从荆芥穗中提取回收聚苯乙烯所需的柠檬烯,其方法是溶剂萃取....
The music becomes four - part , when the pedal adds the chorale melody.当低音部加入合唱曲目的时候,音乐变成了四个声部.Variations on a Theme by Haydn,'st Antoni Chorale "海顿主题变奏曲,“圣·安东尼圣咏 ”The crickets were well into the evening's chor...
The little boy was speechless with shock.那小男孩惊得说不出话来。Laura was speechless with rage.劳拉气得说不出话来。Rachel stood speechless.雷切尔站在那儿一言不发。The Chief was left speechless by this fatuous remark.这句傻话让主任一时说不出话来。The little boy was spe...