英文關鍵字
chemistry
child
childhood
children
class
closeup
cute
educated
education
elementary
energy
enthusiasm
experience
experiment
experimenting
flask
focus
individually
kids
laboratory
learn
learning
lesson
liquid
microscope
modern
note
people
primary
rack
recording
research
results
school
schoolboy
schoolgirl
science
sciences
scientific
smart
student
study
teaching
test
tube
tubes
working
young
youthful