the upper structure的用法和樣例：
例句
- A special steel spreader beam was used to erect the fabricated cage in its proper position in the roadway structure.
使用一個特製的鋼托架來安裝預製的錨固橫樑的鋼筋骨架，使其就位於上部結構內預定的位置上。 - The results show that the energy response has an important effect on the slipping isolator efficiency of the vibration characteristics of the structure.
結果表明，滑移隔震對於上部結構振動響應的隔震效果受能量方面的機理控制。
