麻省理工学院媒介研究室的研究人员发明了三款钱包——“大黄蜂”、“孔雀”以及“熊妈妈”——以帮助人们实现理性消费。
Researchers at the MIT Media lab have invented three different wallets - the Bumblebee, the Peacock and the Mother Bear - to help shoppers save money.
熊妈妈”钱包的设计有助于省钱，用户的存款越少，钱包就越难打开；
The Mother Bear wallet is designed to encourage saving and has a hinge that gets harder and harder to open the lower the bank balance.
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