first-past-the-post       
adjective UK uk/ˌfɜːst.pɑːst.ðəˈpəʊst/ us/ˌfɝːst.pæst.ðəˈpoʊst/
 (选举体制)得票最多者当选的
using a voting system in which a person is elected because they get more votes than anyone else in the area that they want to represent
 Compare: proportional representation