新泽西的法律规定除了医学研究的理由外禁止做这种手术，英国和其他一些欧洲国家也有同样的规定。
New Jersey bans devocalization surgery except for medical or therapeutic reasons, as do Britain and other European countries.
从国际社会的实践来看，国际惯例主要是通过当事人选择而得到适用，也有少数国家法律规定可以强制适用。
In practice, the international commercial usage is mainly applied with the choice of the parties involved and in a few countries it is applicable by the statutes.
经济法不仅具有反垄断功能，也有促进垄断，甚至直接规定国家垄断的功能。
Economic law not only has the anti-monopoly function, but also can promote monopoly, even directly regulate the function of country monopoly.
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