Cotton socks can also provide you with a source of fire-starting tinder.
棉布袜还可以提供点火用的火绒。
Wildfires that produce a lot of smoke are difficult to manage because the source of fire can be hard to see.
森林大火往往产生大量的浓烟，大火很难控制是因为很难找到火源。
The emphases sare on the reduced content level of system oxygen and controlled source of fire.
重点是降低系统含氧浓度和控制火源。
As the source of fire water system the natural water body might be classified and proper qualitative requirement will be setup specially.
天然水体可作为消防水源，但应对不同条件作出相应规定。对消防用水的水质应有适当要求。
As the source of fire water system the natural water body might be classified and proper qualitative requirement will be setup specially.
天然水体可作为消防水源，但应对不同条件作出相应规定。对消防用水的水质应有适当要求。
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