The synthesis of unsaturated polyester resin (UPR) with DCPD modification by using halt-esterifying method was studied.是什么意思_The synthesis of unsaturated polyester resin (UPR) with DCPD modification by using halt-esterifying method was studied.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句