For example, someone who purchases a bone-china coffee cup in a department store can examine its pattern and texture, but isn't likely to learn much about the origins and appreciation of bone china from the store assistant.
舉例來說，消費者去百貨公司買骨瓷咖啡杯，可以仔細端詳花色質感，但若想進一步瞭解骨瓷的由來、掌故及鑑賞方法，恐怕售貨小姐就一問三不知了。