The second king is chelating agents, slowing down the reaction speed by chelating transition metal catalyst ion.The third king is initiator, changing into scavenger for excessive additi...是什么意思_The second king is chelating agents, slowing down the reaction speed by chelating transition metal catalyst ion.The third king is initiator, changing into scavenger for excessive additi...在线翻译_英语_读音_用法_例句