根据国际法，他们必须遵守这个条约。
根据传统的国际法理论，国家是国际法的唯一主体。
According to traditional international law theory, country is the only principal part of international law.
根据传统的国际法理论，国家是国际法的唯一主体。
According to traditional international law theory, country is the only principal part of international law.
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