英文關鍵字
adult
adults
alternative
and
architect
blue
building
business
collar
construction
contractor
ecological
ecology
electricity
energy
engine
engineer
environment
environmental
fuel
generation
generator
green
happiness
hardhat
helmet
industrial
industry
man
men
motion
nature
occupation
one
only
people
person
planning
portrait
power
production
renewable
reserve
sky
slow
smiling
station
technician
technology
turbine
wind
windmill
worker
working
yellow