education concept with tree of knowledge planting on opening old big book in library with textbook stack piles of text archive and aisle of bookshelves in school study class room
ID: 1403304890
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- 大图:8945 × 3500 像素·75.73 cm × 29.63 cm·300dpi·JPG
- 中图:1000 × 391 像素·35.28 cm × 13.79 cm·72dpi·JPG
- 小图:500 × 196 像素·17.64 cm × 6.91 cm·72dpi·JPG