In the past, people used to cook with fire
用火───Use fire;做饭───cook
We have to be careful when we use fire.───当我们用火时候必须小心。
How did Indians in America use fire?───美国的印第安人是如何使用火的？
The first idea I got was to use fire, because I thought lions were scared of fire.───我想到的第一个主意是用火，因为我认为狮子害怕火。
You use fire to disperse the dark clouds, the sky w. . .───用炮火驱散乌云吧，天空也将被染成赤色！
So Bob tried to hold off the natives with the only weapon he knew how to use-fire.───于是，鲍勃只好用他唯一会使的武器——火来抵挡当地人。
I hope everybody can get ready to protect themselves and learn to use fire safely.───我希望大家都做好保护自己的准备，安全用火。
Maintain your landscape to eliminate dead vegetation that could catch fire and use fire - resistant plants.
When did humans first learn to use fire?
This ape-man could walk erect, make and use simple tools and knew how to use fire.
Research on use fire or not in electric power plant.