We should be careful with fire
用火───Use fire;小心───look out
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。
We have to be careful when we use fire.───当我们用火时候必须小心。
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。
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.
Maintain your landscape to eliminate dead vegetation that could catch fire and use fire - resistant plants.