英文關鍵字
again
and
automated
automatic
balance
caution
cautious
climbing
convenience
convenient
conveyor
dizzying
down
downwards
easy
escalater
escalaters
escalator
escalators
faster
forward
glass
gray
grey
handrail
lazy
lift
machines
many
mechanical
metal
over
physics
platforms
repeated
ridges
rise
stair
stairs
stairway
stairwell
standing
steel
step
steps
stock
swift
transport
upwards
vertical
vertigo
video
walking