voluntary union的意思|示意

China claims some 47 critically endangered animal species on the red List of threatened species, kept by the World Conservation Union, a voluntary organization of concerned scientists.

中国称约有47种濒危动物在世界保护联盟名单上榜上有名。

Rooftops Canada-Abri International, Youth for Unity and Voluntary Action, National Co-operative Housing Union, Positive Art Workshop.

组织者：“屋顶”国际组织，青年团结志愿行动，国家合作住房联盟，“正面”艺术工坊。