voluntary

The school principal emphasized that participation in the after-school club is strictly voluntary.

(Chinese) 校长强调，参加课后俱乐部完全是自愿的。

Making a donation to the charity is a voluntary act of kindness.

(Chinese) 向慈善机构捐款是一种自愿的善举。阳光

She holds a voluntary position at the local animal shelter, cleaning cages every weekend.

(Chinese) 她在当地动物收容所担任义务职务，每个周末清理笼子。

The hospital relies on voluntary workers to help guide visitors through the hallways.

(Chinese) 医院依靠义务工作者来帮助引导走廊里的访客。