英文關鍵字
air
biology
boiled
bottleneck
boy
bulb
burn
burning
chemical
chemist
chemistry
child
closeup
coat
cooling
crawl
discovery
egg
experience
experiment
fire
flask
focus
food
heating
highfive
hot
inside
laboratory
lighter
male
man
paper
physics
piece
professional
protein
put
reagent
research
researching
science
scientist
table
trick
two
work
worker