Bearded old man presenting handdrawn chemical formula of testosterone
Schlüsselwörter
testosterone,
molecular,
chemical,
chemistry,
formula,
hormone,
illustration,
molecular,
pattern,
science,
scientific,
signs,
structural,
structure,
symbol,
androgen,
abstract,
background,
draw,
drawing,
element,
graphic,
male,
research,
sex,
technology,
text,
wallpaper,
write,
blackboard,
black,
blackboard,
chalk,
dark,
handwriting,
lettering,
letter,
scripture,
education,
school,
hand,
blue,
classroom,
concept
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