"画素描或速写" can be translated into English as "draw sketches or do quick sketches" or more concisely as "sketch or do quick drawings".
Here are some examples of usage:
I like to sketch or do quick drawings in my free time. （我喜欢在空闲时间画素描或速写。）
She is good at drawing sketches or capturing quick likenesses. （她擅长画素描或快速捕捉人物特征。）