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Use "double-sided" in a sentence
"Its double-sided mirrored doors and decorative back wall merge to create a sense of space."
"The Story Siren is hosting one where there will be two winners: One receives Hush, Hush by Becca Fitzpatrick, Fallen by Lauren Kate, and a double-sided Hush, Hush poster; another receives a double-side Hush, Hush poster."
"Then stuff two pages per side, double-sided, to get four pages per sheet of nice large, readable text."