Snob effect refers to the desire to purchase something only because it is extremely expensive or extremely rare. 

购买一样商品只因为它特别昂贵或者极度稀缺，这种购物欲望就是“虚荣效应”。

Snob effects is the phenomenon that a thing becomes more desirable because fewer people can afford it or can find one. 

在“虚荣效应”现象中，由于非常少的人才能买得起或者买得到，会导致人们购买这件物品的欲望更为强烈。