N-UNCOUNT (为使某一党获得优势)不公正的改划选区Gerrymandering is the act of altering political boundaries in order to give an unfair advantage to one political party or group of people. (为使某一党获得优势)不公正的改划选区 [disapproval]
With the help of skilful gerrymandering, the Party has never lost an election since.