book stack of books on white background many different books on grey background education
ID: 2478032497
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- 大图:3728 × 5613 像素·31.56 cm × 47.52 cm·300dpi·JPG
- 中图:664 × 1000 像素·23.42 cm × 35.28 cm·72dpi·JPG
- 小图:332 × 500 像素·11.71 cm × 17.64 cm·72dpi·JPG