Barna orvos fehér kabátban írás kémiai képletek üveg fórumon laborban - Stock fotó és kép

Low angle view of scientist with felt pen near blurred formulas on glass board

Blurred doctor with felt pen and clipboard writing chemical formulas on glass board

Low angle view of blurred chemist holding clipboard and felt pen near chemical formulas on glass board

View through the transparent Board. female scientist makes a report to colleagues. concept of research

Background image female scientist makes a report to colleagues

Background image female scientist makes a report to colleagues

Teacher talking near blurred digital camera and chalkboard with math formulas in classroom

Teacher having online lesson on laptop near math formulas on chalkboard

Teacher holding chalk near blurred digital camera and chalkboard in class

Smiling teacher pointing with fingers near chalkboard with math formulas and digital camera in class

Teacher pointing at math formulas on chalkboard and holding laptop during online lesson in classroom

Positive teacher pointing at blurred chalkboard with math formulas near digital camera in school

Smiling teacher holding chalk and laptop near math formulas on chalkboard

Positive teacher holding chalk and laptop near chalkboard in school

Happy teacher holding chalk near mathematic formulas on chalkboard