英文關鍵字
adult
analyzing
architecture
caucasian
chemistry
child
childhood
children
city
concept
curiosity
destination
development
europe
european
flask
fun
happy
holding
indoors
inside
intelligence
kid
knowledge
kopernik
lab
laboratory
landmark
learn
learning
lesson
lifestyle
male
medicine
microscope
physics
play
research
schoolboy
science
scientific
sightseeing
smart
son
structure
student
studying
tourism
visitors