L-aspartic acid has been used as raw material and polyaspartic acid has been synthesized by 3 methods: pyrocondensation polymerization,liquid phase polymerization and modification polymerization.是什么意思_L-aspartic acid has been used as raw material and polyaspartic acid has been synthesized by 3 methods: pyrocondensation polymerization,liquid phase polymerization and modification polymerization.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句