In factories, workers use fire to melt metals make things of different shapes.
工厂里，工人们用火熔化金属来制造各种不同形状的产品。
In factories, workers use fire to melt metals to make things of different shapes.
在工厂里，工人们用火熔化金属，以制造各种形状的物品。
In factories, workers use fire to melt metals to make things of different shapes.
在工厂里，工人们用火熔化金属，以制造各种形状的物品。
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