academic
algebra
atom
biological
biology
blackboard
chalkboard
chemical
chemistry
class
classroom
consulting
coronavirus
diagram
drawing
education
equation
experiment
formula
handwriting
homework
idea
illustration
knowledge
laboratory
learning
lesson
medical
medicine
microscope
molecular
molecule
physics
professional
research
school
science
scientific
student
study
teacher
technology
test
theory
university
vaccine
virus
whiteboard
writing
定額
The scientists, chemists, discover the chemical formula write on whiteboard in laboratory. The researcher discover vaccine or drug for treatment patients infected COVID19.の素材 [FY310145173230]
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