A asian men is a scientist holding and look at test tube with chemical liquid. Focus to young scientist. Microscope laptop and more test tubes with liquid put on table in laboratory room
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- 大图:4651 × 4337 像素·39.38 cm × 36.72 cm·300dpi·JPG
- 中图:1000 × 932 像素·35.28 cm × 32.88 cm·72dpi·JPG
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