比較廣告 客觀性 真實性 引人錯誤 依附商譽 貶抑商譽 可受檢驗 歐體比較廣告指令 德國不正競爭防制法 公平交易法 比較廣告違反公平交易法一覽表 Comparative advertising Principles of objectiveness and truth Misleading Take unfair advantage of the reputation Denigrate or discredit reputation The German act against unfair competition Directive 2006/114/EC The fair trade law of Taiwan