"画素描或速写" can be translated into English as "draw sketches or do quick drawings" or more concisely as "sketch or do quick sketches".
"Draw sketches" emphasizes the act of creating sketches.
"Do quick drawings" or "do quick sketches" highlights the rapid, spontaneous nature of speed drawing or sketching.
Both expressions are commonly used and can be adjusted based on the specific context or emphasis you want to convey.