额外的英语怎么说

额外 [词典] additional; added; （超出规定数量或范围的） extra; superfluity; [例句]旅馆每个房间都有电视机作为额外优待。Television is available in each of the hotel rooms as an extra.

释义extraadditional网络Additional,extra,superfluity短语额外费用premium,extra charge,extra expense额外酬金Praecipium,hatmoney,hat money

额外的名词addition， 额外的副词是 additional.