In the last two weeks, parts of the national capital region have reported levels higher than 500.
然而，在过去的两周里，印度首都的部分地区报告的空气质量指数高于500。
中文百科
首都圈 Capital region
（重定向自National Capital Region）
首都圈指的是以首都为中心的都市圈。一般而言，拥有国家中枢机能的首都及其周边区域即称为首都圈。
英语百科
Capital region 首都圈
（重定向自National Capital Region）
A capital region, also called a national capital region, capital district or capital territory, is a region or district surrounding a capital city. It is not always the official term for the region, but may sometimes be used as an informal synonym.