vice and virtue foods = 有益及有害健康的食品
The Incluence of Price Dicount Versus Bonus Pack on the Preferene for Virtue and Vice Foods
=打折與加送贈品（這兩種不同促銷方式）對人們採購有益及有害健康的食品時的影響比較
- Aug 24 Sat 2013 00:24
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英文翻譯~Virtue and Vice Foods.
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