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grammatical number - material vs materials. Which is correct?
Material or Materials - What Is The Plural Of "Material"?
singular vs plural - "material" vs. "materials" - English Language ...
Material vs. Materiel – What’s the Difference? - Writing Explained
material是什么意思_material的翻译_音标_读音_用法_例句_爱词霸 …
material or Materials? - TextRanch
Material Definition & Meaning - Merriam-Webster
Material vs. Materiel - Grammar.com
Commonly Confused Words: Material and Materiel - ThoughtCo
FBI seized NYPD Tom Donlon’s decades old ‘material’ – NBC New …