英文關鍵字
architecture
ascend
brick
bricks
brown
built
cement
climb
constructed
descend
down
exercise
interval
levels
lift
lower
many
masonry
middle
mortar
necessary
passage
passageway
path
raise
rectangle
rectangles
rectangular
red
repeat
repeated
repitition
risk
rungs
slip
slippery
square
staircases
stairs
stairway
stairwells
steps
stock
stone
through
via
video
walk
walking
way
wood