他在公务员系统工作了十年，主要负责社会福利项目。

He has served in the ___civil-service for ten years, mainly working on social welfare programs.

他在公务员系统工作了20年。

He has worked in the ___civil-service for 20 years.

公务员考试是为了确保基于能力而非政治关系来选拔政府工作人员。

The ___civil-service exam ensures government employees are selected based on ability rather than political connections.