英文關鍵字
flame
snake
male
chemical
match
spirit
dry
test
fire
hand
pills
calcium
gluconate
tablets
result
reaction
heated
slow
carbon
pharaoh
oxide
burning
dioxide
water
slowmotion
smokey
180fps
experiments
pupils
spark
teaching
incandescent
sets
chemistry
firework
substance
formula
up
alcohol
presentation
macro
real
disposable
technology
transition
black
concept
formation
detonation
learning
matches