The average frequency was 0.036 for univalent,9.18 for bivalent,0.036 for trivalent,0.80 for quadrevalent and 0.38 for hexavalent.是什么意思_The average frequency was 0.036 for univalent,9.18 for bivalent,0.036 for trivalent,0.80 for quadrevalent and 0.38 for hexavalent.在线翻译_英语_读音_用法_例句