3. Smart cards, which can carry as much as 80 times more information on them than conventional cards with a magnetic stripe, are already widely used in European countries where centralized banks can roll out new services on a nationwide basis.
存储的信息量是普通磁卡信息载量的80多倍的智能卡,已经在欧洲各国被广泛地使用,这样欧洲各国中央银行得以在全国范围展开新型的服务。
句子分析:Smart cards是主语;which can carry as much as 80 times more information on them than conventional cards with a magnetic stripe, 是修饰主语的定语从句;Smart cards are already widely used in European countries是句子主干;where centralized banks can roll out new services on a nationwide basis.是修饰European countries的地点状语。