DC
noun [ U ] uk/ˌdiːˈsiː/ us/ˌdiːˈsiː/
(ELECTRICITY)
直流电（direct current的缩写）
abbreviation for direct current: electrical current that always flows in one direction
Compare: AC (ELECTRICITY)
(ADDRESS)
哥伦比亚特区（the District of Columbia的缩写）
abbreviation for the District of Columbia: an area of the eastern US that has the same borders as the US capital, Washington, and is not part of a US state