汇率是宏观经济环境中的一个重要变量，其变动对国民经济有着深远的影响。
As an important macroeconomic environment variable, Exchange rate has a profound impact on the national economy.
《管子》以轻重学说作为其价格思想的理论基础，分析商品价格贵贱及其变动的原因。
The balance theory was the base of GuanZi's price ideology, which analyzed the reason why the commodity was expensive or poor and its change.
然而希勒却发现，在长时间内事实正好相反，预测价格走势是可能的，而且其变动和人类行为有关。
Robert Shiller found however that over long periods, the opposite is true. It is possible to predict the movement of prices and that its changes are linked to human behaviour.
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