单词学习：public service 名词短语
public service
/ˌpʌblɪk ˈsɜːrvɪs/
公共服务；公益服务；公职
Gu Laoshi dedicated his life to public service, working tirelessly to improve the community.
顾老师一生致力于公共服务，为改善社区而不懈工作。
单词卡片
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