Knowledge and idea concept. Light bulb with light in hand on a blank blue background. Brain wisdom knowledge and energy conservation is a creative idea.
ID: 2055623774
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- 大图:5189 × 3393 像素·43.93 cm × 28.73 cm·300dpi·JPG
- 中图:1000 × 654 像素·35.28 cm × 23.07 cm·72dpi·JPG
- 小图:500 × 327 像素·17.64 cm × 11.54 cm·72dpi·JPG