英文關鍵字
boys
business
businessman
classroom
contract
desk
device
documents
education
gadget
hand
hands
holding
home
indoors
lifestyle
male
men
message
mobile
note
notebook
office
paper
pen
people
person
phone
plan
room
sheet
sign
signature
sitting
smartphone
student
students
study
studying
table
technology
teen
two
university
using
work
workplace
writing
young