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party member
若い彼は、政治に興味を持ち党員になった。
Being young, he became a party member after developing an interest in politics.
その政党は、来年の選挙に向けて党員を増やしている。
The political party is increasing its members for next year's election.
彼女は長年、熱心な党員として地域活動に貢献してきた。
For many years, she has contributed to community activities as an enthusiastic party member.