wind power
風力
alternative energy
application
book
boy
child
class
classroom
computer
concept
connection
creative
education
elementary
girl
group
happy
hispanic
indoors
internet
junior
kid
laptop
learning
lesson
little
many
networking
online
person
power
preteen
remote
renewable energy
school
science
smiling
student
teacher
team
teamwork
tech
technical
technology
together
tutor
virtual
wind turbine
windmill
young
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