Προβολή χαμηλής γωνίας του θολή χημικού κρατώντας πρόχειρο και πιλήματα στυλό κοντά σε χημικούς τύπους στο γυάλινο πίνακα - Φωτογραφίες & Εικόνες Αρχείου

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

Thinking, scientist hand and woman writing on clear board for science formula research. Laboratory worker, female person and focus with planning and futuristic vision for medical test with mockup.

Brunette doctor in white coat writing chemical formulas on glass board in lab

Figuring out how different scientific systems work. a young scientist writing notes on a glass wall in a lab

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 pointing at math formulas on chalkboard during online lesson in class

Teacher holding chalk near blurred digital camera and chalkboard in class

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

Teacher pointing at math formulas on chalkboard during online lesson in class

Happy teacher holding chalk near mathematic formulas on chalkboard

Teacher having video call on laptop near chalkboard with math formulas

Teacher holding laptop during online lesson near chalkboard with math formulas in class

Teacher in eyeglasses talking near blurred digital camera and chalkboard