Once a broad customs union is established, trade, financial, and investment links within it grow to the point that its members stabilize their exchange rates vis-à-vis one another. Then, perhaps a couple of decades after the customs union is formed, its members consider creating a true monetary union with a common currency (the Eurasian ruble?) that can be used as a unit of account, means of payment, and store of value.
一旦建立了广泛的关税联盟，其内部的贸易、金融和投资联系就会达到一个水平，令其成员国将彼此之间的汇率固定下来。接着——也许需要在关税联盟成立好几十年后——其成员国将考虑建立真正的货币联盟，采用共同货币（欧亚卢布？）作为结算单位、支付手段和价值储藏工具。