佛罗里达州、俄勒冈州和华盛顿州的法律规定，州内所有城市地区都必须存在一些形式的遏制边界。
All urban areas in Florida, Oregon, and Washington are required by state law to have some form of containment boundaries.
佛罗里达州和明尼苏达州已经和华盛顿州一样对法律用词进行了彻底修改。
Florida and Minnesota have already completely revised their laws as Washington state is doing.
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