乙酰苯胺 、 己二酸和邻苯二甲酸氢钾可以使PVC结晶度增大.Acetanilide and hexane diacid, potassium hydrogen phthalate could improve PVC crystallinity.同时可以供应己二酸螺旋霉素,恩波酸螺旋霉素.Spiramycin adipate and spiramycin embonate are also available for animal use...
这个演员受到提携从无名少女一跃成为明星时年仅17岁。The actress was only 17 when she was plucked from obscurity and made a star.那年轻的女高音歌手受到一着名指挥家的提携.The young soprano was taken up by a famous conductor.“ 数子 ” 明明指朋友并非小孩子, 朋友怎可以 “ 提携 ”?'severa...