To any menber of the WTO, DSU is eigher a protective means or a tool of ensuring its duty, namely the unedertaking of state Responsibility.

• 对WTO每一个成员来说争端解决机制既是一种保护其权益的手段 ,又是督促其履行应尽的条约义务 ,或为尽到义务时承担国家责任的工具