"通货膨胀"和"通货紧缩"的英语该怎么说?

通货膨胀：inflation
A persistent increase in the level of consumer prices or a persistent decline in the purchasing power of money, caused by an increase in available currency and credit beyond the proportion of available goods and services.
由于市场上通货和信用货币增到超过市场所提供的商品和服务而导致的消费品价格水平的持续上涨和货币购买力的持续下跌

通货紧缩： deflation
A persistent decrease in the level of consumer prices or a persistent increase in the purchasing power of money because of a reduction in available currency and credit.
通货紧缩：由于可获得货币和信贷的减少，导致消费品价格水平的持续下降或货币购买力的持续提高

inflation
deflation