Tow step process was involved in the preparation of the copolyester:acetylsis of p acetoxybenzoic acid and synthesis of copolyester(PET/PHB).是什么意思_Tow step process was involved in the preparation of the copolyester:acetylsis of p acetoxybenzoic acid and synthesis of copolyester(PET/PHB).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句