由于周围大气温度的变化，桥梁上部结构产生的温度变形是一个客观存在的事实。
Due to the atmosphere temperature change, the bridge superstructures' thermal deformation exist impersonality which is a fact.
由于周围大气温度的变化，桥梁上部结构产生的温度变形是一个客观存在的事实。
Due to the atmosphere temperature change, the bridge superstructures' thermal deformation exist impersonality which is a fact.
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