The answer is "these three members have different <span>value or roles in the group".
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Values refers to our own convictions that we accept are imperative both to us and society all in all. As in the above situation Bob, Mary and Tom have different and their own roles and values in the group.
As an expression of the legal sovereignty of a country, the WTO gains some power because it is approved by its member states. The extent of the legal sovereignty of WTO member states depends on whether we use an "abolitionist concept" of state sovereignty or a "veto-based concept".
It means to be concerned about accuracy and detail
