国家结构形式主要可以分为单一制国家和复合制国家。
The form of state's structure is divided into single state and multiple state.
人们还是选择单一配偶制和婚姻。
单一语言制在美国社会更占主导地位。
多数国家采用单一汇率制，一切外汇交易按官价汇率进行结算。
An exchange rate is the rate at which one currency can be exchanged for another.
多数国家采用单一汇率制，一切外汇交易按官价汇率进行结算。
An exchange rate is the rate at which one currency can be exchanged for another.
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