revolve around

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WordNet Dictionary
	Definition:		[v]  move around in a circular motion; "The Earth revolves around the Sun" [v]  center upon; "Her entire attention centered on her children"; "Our day revolved around our work"
	Synonyms:		center, center on, circle around, circle round, concentrate on, focus on, revolve about
	See Also:		bear on, circle, come to, concern, pertain, refer, relate, touch, touch on