narrow pathway high in the air (as above a stage or between parts of a building or along a bridge)
catwalk详细解释
cat.walk n.（名词）A narrow, often elevated walkway, as on the sides of a bridge or in the flies above a theater stage.狭窄甬道：狭窄的、通常升空的过道，如桥的侧边或戏院舞台上布景控制处的过道
