英文關鍵字
adult
caucasian
college
computer
education
encouraging
further
helping
indoors
laptop
lecturer
library
lockdown
mature
medium
research
senior
shot
student
studying
teacher
together
tutor
university
working
英文關鍵字
adult
caucasian
college
computer
education
encouraging
further
helping
indoors
laptop
lecturer
library
lockdown
mature
medium
research
senior
shot
student
studying
teacher
together
tutor
university
working