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Use "hours" in a sentence
"I opened a ticket with HTC within a couple of hours of receiving the phone they promised to ship out a new phone in 24 hours that was on Jan 7th - 8 days ago "
"Time: About 1 1/2 hours plus 14 to 24 hours rising"
"The Greeks divided the natural day and night into twelve equal parts each, and the hours thus formed were denominated _temporary hours_, from their varying in length according to the seasons of the year."