chemische Strukturformel von PEG auf einer Schiefertafel
Palabras clave
chemistry,
formula,
chemical,
structure,
release,
blackboard,
object,
plate,
board,
chalk,
blackboard,
black,
school,
slate,
schooling,
school,
drawing,
written,
illustration,
text,
drawn,
figure,
drawing,
molecular,
graphic,
science,
symbol,
pattern,
element,
concept,
molecular,
connection,
atom,
studying,
medicine,
pharmacy,
ointment,
cosmetic,
cream,
lipstick,
eye drop