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....
于1985年6月25日亲笔签署作成[盖印].Given under my hand and seal on the 25 th of June , in the year 1985.本表格如经网上提交,申请人不需要签署及盖印.Signature and company chop are not required for application form submitted online.这份协议需要双方盖印.This agreement...
People were craning out of the windows and waving.人们把头探出窗外挥手致意。He stood there dumbly, craning his neck and swallowing noisily.他呆呆的立在那里, 直着脖子咽吐沫.Lowering its head and craning its neck , it bursts into a wild gallop.它反而更低地...