上海合作组织的主要任务之一，就是成员国之间开展安全合作。

A major task of the SCO is to promote security cooperation among its member states.

youdao

上海合作组织的主要任务之一，就是成员国之间开展安全合作。

A major task of the SCO is to promote security cooperation among its member states.

youdao