metropolitan districts/regions

• 都市区

metropolitan districts/regions的用法和样例：

例句

1. Nonattainment areas now must include the entire metropolitan area unless the state can show that some sub-area does not contribute significantly to the nonattainment problem.
   现在的非达标区域必须包括整个都市区，除非这个州能够表明，某些分区并不存在严重的非达标问题。