The government must conduct reapportionment of parliamentary seats based on the latest census data.

reapportionment 是由前缀 re-（表示"重新"）和 apportionment（分配）组成的复合名词。apportionment 本身来自动词 apportion（分配、分摊），加上名词后缀 -ment 构成。 reapportionment 指"重新分配"，特指根据人口变化重新划分选区或分配议会席位的过程。