英文關鍵字
animation
atoms
biochemist
biochemistry
black
bonds
cascading
chemist
chemistry
covalent
dropping
falling
form
grey
ions
magnified
medicine
microscopic
molecular
molecule
no
particles
people
physics
pink
science
scientist
small
structure
tiny
英文關鍵字
animation
atoms
biochemist
biochemistry
black
bonds
cascading
chemist
chemistry
covalent
dropping
falling
form
grey
ions
magnified
medicine
microscopic
molecular
molecule
no
particles
people
physics
pink
science
scientist
small
structure
tiny