英文關鍵字
analysis
analyzing
beaker
boy
chemical
chemist
chemistry
child
childhood
class
classroom
clever
discovery
education
equipment
experiment
flask
goggles
happy
indoor
kid
knowledge
lab
laboratory
learn
learning
lesson
liquid
medicine
person
pipette
preteen
pupil
reaction
research
school
schoolboy
science
scientific
scientist
smart
study
test
tube