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Sigma KEE - DayTime

一天的时间

The class of TimeIntervals that begin at Sunrise and end at Sunset.

Relationships
Parents	时距	An interval of time. Note that a TimeInterval has both an extent and a location on the universal timeline. Note too that a TimeInterval has no gaps, i.e. this class contains only convex time intervals.
Children	下午	The class of TimeIntervals that begin at noon and end at Sunset.
	早上	The class of TimeIntervals that begin at Sunrise and end at noon.