志愿者人数的增长，特别是青少年人数的增长意味着我们美国所建立的新的服务文化。

This increase in volunteering is evidence of the new culture of service we are building in America, especially among young people.

youdao

志愿者人数的增长，特别是青少年人数的增长意味着我们美国所建立的新的服务文化。

This increase in volunteering is evidence of the new culture of service we are building in America, especially among young people.

youdao