You know that feeling of finding a $20 bill in your pants and it feels like free money?
你知道那种在裤子里发现价值20美元的纸钞，而且它感觉像是白来的钱的感觉吗？
2
This is especially true if the item is on sale, as finding an unexpected bargain leaves buyers feeling flush and pleased.
如果在廉价出售上，那这条理论尤其准确，像发现一件未曾想到的特价商品，会使购买者感到兴奋和愉悦一样。
3
But real happiness comes from finding something sustainable like a family and feeling good about what you are doing now rather than what you're trying to get.