ref·er·en·tial /ˌrɛfəˈrɛn(t)ʃəl/
(a.)指示的
Ref·er·en·tial a. Containing a reference; pointing to something out of itself; as, notes for referential use. -- Ref*er*en*tial*ly, adv.
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referential
adj : referring or pointing to something; "symbols are inherently
referential"