来源: pexels.com
![a man standing in front of a blackboard holding a stick, inspired by Fei Danxu, pexels contest winner, academic art, wearing square glasses, janice sung, lachlan bailey, geometrically correct](https://imagef.promeai.pro/immerse-static/pexels/2024/05/04/d0864e6a7f044289a8495887153712cc.jpeg?width=2351&height=1567&fit=contain&format=webp)
a man standing in front of a blackboard holding a stick, inspired by Fei Danxu, pexels contest winner, academic art, wearing square glasses, janice sung, lachlan bailey, geometrically correct
来源: pexels.com
来源: pexels.com
来源: pexels.com