英文關鍵字
cast
cigarette
conveyor
descend
descending
details
down
escalator
garbage
going
moving
pedestrian
refuse
staircase
traffic
transport
use
waste
英文關鍵字
cast
cigarette
conveyor
descend
descending
details
down
escalator
garbage
going
moving
pedestrian
refuse
staircase
traffic
transport
use
waste