Usually I marked the day by doing some community service work, but I wanted to take this opportunity to thank the District of Columbia for being my home for eight years.

通常，我都是到社区做些服务工作来纪念这一天，但我想借今天的机会感谢哥伦比亚特区给了我一个住处，我在这里住了八年。

youdao

Students earn credit by doing community service, and cash it in for flight time and lessons.

NPR: Terror, Hope on the Streets of Compton, Part 2

The Office of Social Innovation and Civic Participation focuses on doing business differently by promoting service as a solution and a way to develop community leadership.

WHITEHOUSE: Conference on Next Generation Leadership