Notepaper in white colour standing on a buffer wire in between a keyboard and math book. Old notation paper stands near computer equipment for typing with a thick mathematic sheets
ID: 1567605058
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- 大图:6000 × 4005 像素·50.8 cm × 33.91 cm·300dpi·JPG
- 中图:1000 × 668 像素·35.28 cm × 23.57 cm·72dpi·JPG
- 小图:500 × 334 像素·17.64 cm × 11.78 cm·72dpi·JPG