The weak ecological environments are complex and multiplicity And they are damageable.

脆弱生态环境地区复杂多样,易被破坏.

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As the most damageable component of bridge, the concrete bridge deck is most required to maintain.

混凝土桥面板是桥梁组成部分中最易损坏的结构单元, 维修频率最高.

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As the most damageable component of bridge, concrete bridge deck is maintained more often than others.

混凝土桥面板作为桥梁的重要组成部分, 维修频率最高.

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