英文關鍵字
alpine
architecture
barrier
basetunnel
beautiful
beauty
boringmachine
bridge
cars
cliff
diggingtunnel
dive
economically
europe
exploring
freeway
holiday
infrastructure
island
journey
junction
landtunnel
magnificent
mountains
naturaltunnel
pass
passage
peace
peaceful
roadtunnel
rock
rough
safety
surroundings
technological
tourism
transport
travelling
trucks
under
vacation
ventilation
view
waste
wonderful