英文關鍵字
architecture
background
blue
bucket
building
bulldozer
city
clear
construction
day
dig
digger
digging
dirt
earth
equipment
excavation
excavator
exterior
grass
ground
hydraulic
industry
machine
machinery
motion
move
movement
outdoor
outside
place
preparing
sand
shovel
sky
soil
still
summer
sunny
town
track
tractor
tranquil
transport
transportation
tree
urban
vehicle
working
yellow