Monopoly: Marriage is the most common form of a monopoly, which is the situation when a market has only one seller of a good or service.
垄断：婚姻是一种垄断的最普通形式。它是这样一种状态，即一个市场只有一件物品或服务的唯一卖者。
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Not only do it eliminate the conflict the member states apply national law create, but also effectively take precautions against the creation of monopoly and market power in European Common market.
The basic characteristic of abstract monopoly service system with simple structure is described, and the axiom system on cost allocation of its common losses is built.