principal area       
noun [ C ] uk/ˌprɪn.sɪ.pəl ˈeə.ri.ə/ us/ˌprɪn.sɪ.pəl ˈer.i.ə/
 主要地区(1996年威尔士根据法律划分的22个地方政府管辖的区域)
one of 22 areas of local government into which Wales was divided by law in 1996
  Casnewydd is a city and principal area in Wales. 卡斯纽伊德是威尔士的一个城市和主要地区。 
 - More examples
 - Here is a list of Welsh principal areas by population.
 - There are 22 principal areas in Wales.
 - Can you name the principal areas of Wales?
 - The district system of two-tier local government was abolished in 1996 and replaced by the current system of unitary principal areas.