英文關鍵字
academic
adolescence
background
black
blackboard
board
boy
career
chalk
chalkboard
class
classroom
clever
college
confident
education
exam
fingers
formula
green
hair
hand
hands
high
learner
male
math
mathematics
maths
middle
modern
one
person
school
schoolboy
science
smart
standing
student
study
suit
teen
teenage
teenager
tutor
university
unknown
writing
young