求翻译：【摘要】汇率决定理论是一国货币的汇率水平受什么因素决定和影响。本文讨论汇率决定的背景：实行货币自由兑换，汇率由市场来决定的国家。汇率决定理论是国际金融理论的核心之一，随着经济背景和经济学基础理论的演变经历了不同的发展，主要经历了国际借贷说、购买力平价说、汇兑心理说、国际收支说和资产市场说几个阶段。是什么意思？

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[Summary] exchange rate theory is decided by a country's currency exchange rate level by what factors determine and influence. This article discusses the background: the currency exchange rate decisions freely convertible currency, the exchange rate determined by the market. Exchange rate decision t

[Abstract)The exchange rate decision theory is a country currency exchange rate level any factor decision and the influence.This article discusses the exchange rate decision the background: Implements the currency free exchange, the exchange rate the country which decided by the market.The exchange

The "Summary" theory of exchange rate determination is what determines a country's currency exchange rate levels and influence. This article discusses the background of the exchange rate determination: currency convertibility exchange rate decided by the market of the country. Exchange rate determin