Word familyadjectiveaffinitivenounaffinity cardaffinity
afˈfinity ˌcard noun [countableC]
a type of creditcard, where an amount of money is given by the credit card company to a charity every time the card is used 慈善信用卡,爱心信用卡〔每次使用此卡,信用卡公司都会把一定数额的钱捐给一家慈善机构〕
From Longman Business Dictionary
affinity cardafˈfinity cardBANKING
a CREDIT CARD where a certain amount of money is given by the credit card company to a CHARITY every time the card is used