这是个很棒的绘画练习练习，真的，他说。
It's a good exercise, he said, of the drawings. It really is.
很多孩子不知道艺术家通过观察-绘画练习来学习画画。
Many children do not know that artists have learned to draw by doing observation-drawing practice.
水写纸是一种专门供书法、绘画练习之用的纸张，以水代替墨汁书写、绘画。
Water-writing paper is a kind of paper for calligraphy and painting .
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