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1.The structural steel design of the bridge is very important for its stability.
这座桥的结构钢设计对其稳定性至关重要。
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2. The structural steel design of the building is very complex and requires a lot of expertise.
这座建筑的结构钢设计非常复杂，需要很多专业知识。
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3.The structural steel design of the bridge is carefully considered to ensure safety and durability.
这座桥的结构钢设计经过仔细考虑，以确保安全和耐用性。