The earliest people probably stored fire by keeping slow burning logs alight.
早期的人类可能通过让燃烧缓慢的原木保持燃烧状态来保存火种。
The Eskimos produced a slow-burning spark by striking quartz against iron pyrites.
爱斯基摩人利用硫化铁矿石击打石英获得缓慢燃烧的火花。
The Eskimos produced a slow-burning spark by striking quartz against iron pyrites.
爱斯基摩人利用硫化铁矿石击打石英获得缓慢燃烧的火花。
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