science and clinic background. Chemical and Medical laboratory research. laboratory beakers with colorful liquids and reagents.
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- 大图:4000 × 6000 像素·33.87 cm × 50.8 cm·300dpi·JPG
- 中图:667 × 1000 像素·23.53 cm × 35.28 cm·72dpi·JPG
- 小图:333 × 500 像素·11.75 cm × 17.64 cm·72dpi·JPG