Ammonium perclilorate is reacted with ethylenediamine in excess and then the excessive ethylenediamine is neutralized with perchloric acid.是什么意思_Ammonium perclilorate is reacted with ethylenediamine in excess and then the excessive ethylenediamine is neutralized with perchloric acid.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句