In this paper the nontoxic plasticizer tributyl citrate has been prepared by the catalysis of the molecular sieve and the ion exchange resin.是什么意思_In this paper the nontoxic plasticizer tributyl citrate has been prepared by the catalysis of the molecular sieve and the ion exchange resin.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句