单词：steel girder
steel girder的用法和样例：
例句
- A steel girder may warp in a fire.钢梁遇火会变弯。
- It's a hulking shell, concrete walls crumbling, steel girders, like an exposed skeleton, rusting slowly.一个粗陋的外壳，混凝土墙的碎屑，钢梁，好像一个正在慢慢生锈的骷髅。
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