How did Indians in America use fire?
美国的印第安人是如何使用火的？
Factory workers also use fire to make glasses.
工人们也用火来烧制玻璃。
Being able to use fire was a big progress in human history.
掌握对火的使用，是人类历史上取得的重要进步。
Factory workers also use fire to make glass.
工厂的工人也用火制玻璃。
Nobody knows exactly how people began to use fire.
没有人确切地知道人们是如何开始使用火的。
Children are learning how to use fire extinguisher.
孩子们在学习如何使用灭火器。
But he could also use fire to shape metal and make weapons.
但他还可以用火来铸金属并制作武器。
Nowadays, people do not only use fire to cook food or boil water.
现在，人们不仅仅用火做饭，烧水。
Fire can destroy everything. We have to be careful when we use fire.
火能烧毁一切。当我们用火的时候必须小心。
Fire can destroy everything. We have to be careful when we use fire.
火能烧毁一切。当我们用火的时候必须小心。
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