城市景观中的物质流、能量流、人口流和信息流等，是维持城市景观结构的主要功能流。
The flow of material, energy, population, information and species in urban landscape are the primary functional flows sustaining the urban structure and functions.
人行桥作为城市重要的人造景观，应力求造型美观、结构新颖、形式多样。
Pedestrian bridge as an important artificial landscape in city should be built with beautiful shape, new structure and varied forms.
桥梁一般位于城市中结构要害，这使桥梁成为城市景观的重要构成。
The bridge generally lies in structure in the city vital partly, this makes the bridge become the important composition of the cityscape.
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