英文關鍵字
chemistry
child
childhood
children
class
closeup
cute
different
educated
education
elementary
energy
enthusiasm
equipment
experience
experiment
experimenting
flask
girl
kids
laboratory
learning
lesson
liquid
materials
microscope
modern
note
people
primary
research
results
school
schoolboy
schoolgirl
science
scientific
smart
student
study
teaching
test
tube
with
working
young
youthful