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1. Thesteel beam is strong enough to support theweight of the building.
这个钢梁足够坚固，能支撑大楼的重量。
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2. The steel plateis being used as a protective layer onthe surface of the tank.
这个钢板正在用作水箱表面的防护层。
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3. Steel isa versatile material that canbe shaped into many different forms.
钢铁是一种多功能材料，可以制成许多不同的形状。