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Profesor enseñando en un laboratorio

A man with salt-and-pepper hair and a beard gestures toward a blank whiteboard in a chemistry laboratory filled with glassware and lab benches under bright fluorescent lighting.

a 35-year-old man with salt-and-pepper hair, grey eyes, tan skin and a short beard gesturing at a blank whiteboard beside a bench of glassware in a chemistry lab lecture, overhead fluorescent light, 50mm Ver más

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