Many argue that the current electoral system fails to provide fair political representation for minority groups.

representation 是名词，来自动词 represent（代表、象征）。represent 由前缀 re-（表示"再次"）和 present（呈现、展示）组成，字面意思是"再次呈现"。representation 指"代表、表现"，在这里特指政治上的"代表权"或"代表制度"。