As a marketing expert, Vohs sees the potential for a link between money and happiness as an aid for business owners.
作为一名市场营销学专家，佛赫斯看到了金钱与快乐之间的这种联系其对企业拥有者的潜在帮助。
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"You've got all these different sources and they all have they potential to be made into biodiesel or renewable diesel," said Douglas Tiffany, a biofuels expert at the University of Minnesota.
"Any serious potential buyer will be allowed to have a photo expert of their choice examine the original photograph before any money changes hands," he adds on eBay.