画材
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Meanings
1
art supplies; art materials
Refers to physical materials used for drawing or painting, such as paints, brushes, canvas, etc.
I bought new paints at the art supply store.
These art materials are easy to use even for beginners.
2
subject matter of a painting; motif
Refers to the theme or subject depicted in a painting, not the physical materials. Less common than the 'art supplies' sense.
The subject matter of his works is mainly landscapes.