Hand drawn biology on chalkboard.
Palabras clave
blackboard,
medicals,
blackboard,
vignetting,
chemistry,
test,
on,
formula,
nucleus,
vector,
symbol,
drawing,
chalk,
black,
class,
doodle,
illustration,
system,
biology,
design,
science,
school,
anatomy,
mobile phone,
education,
art,
background,
back,
drawn,
board,
health,
nervous,
blood,
laboratory,
hand
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