Donald Foley says the winning car must have real market appeal. 福利說，獲勝的車型必須具有真正的市場吸引力。
Choosing satisfactory products is important because it helps a firm replace old ones that have lost their market appeal. 選擇令人滿意的產品是至關重要的，因為這有助于一個企業換掉那些已失去市場吸引力的老產品。
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