system [' sistsm] n.体系,系统;制度;身体;方法
【例句】Thirdly, money acts as store of wealth. It is difficult to imagine saving under a barter system.第三,金钱充当财富储备媒介。我们很难想象在物物交换制度下的储蓄媒介。
still [stil] adv•还,仍旧;更,还要
【例句】Then the barter system was replaced by coins, which still had real value since they were pieces of rare metal.然后,物物交换制度被货币取代,这些货币仍然有实际价值,因为它们是稀有金属。
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