science chemistry biology medicine and people concept - close up of scientist or doctor hands holding and pouring pill content into petri dish in laboratory
ID: 247791874
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- 大图:3558 × 2252 像素·30.12 cm × 19.07 cm·300dpi·JPG
- 中图:1000 × 633 像素·35.28 cm × 22.33 cm·72dpi·JPG
- 小图:500 × 316 像素·17.64 cm × 11.15 cm·72dpi·JPG