The riyal has been fixed against the US dollar at about 3.64 to 1 since 1980.
亚尔汇率自1980来固定在：3.64亚尔：1美元。
Although the RMB yuan was fixed against the us dollar for several years, it has been fluctuating against the Korean won, which provides us with a natural experiment to test the exchange rate effect.
虽然人民币汇率制度在很长一段时间都是紧盯美元的，但它对韩元一直是波动的，这为我们提供了一个自然实验去测试汇率制度的影响。
Although the RMB yuan was fixed against the us dollar for several years, it has been fluctuating against the Korean won, which provides us with a natural experiment to test the exchange rate effect.
虽然人民币汇率制度在很长一段时间都是紧盯美元的，但它对韩元一直是波动的，这为我们提供了一个自然实验去测试汇率制度的影响。
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