Chalk scribbles on a math board. Blackboard formulas shapes geometry. The concept of education. Illustrations can be used to return to the school topic algebra natural sciences
ID: 1897704460
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- 大图:2881 × 1988 像素·24.39 cm × 16.83 cm·300dpi·JPG
- 中图:1000 × 690 像素·35.28 cm × 24.34 cm·72dpi·JPG
- 小图:500 × 345 像素·17.64 cm × 12.17 cm·72dpi·JPG