The synthetic method of N-alkyl-3-pyrrolidinones was studied through the syntheses of hexyl,octyl and benzyl substituted pyrrolidinones.是什么意思_The synthetic method of N-alkyl-3-pyrrolidinones was studied through the syntheses of hexyl,octyl and benzyl substituted pyrrolidinones.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句