It speculated that the most primitive method is heap burn, putting the dry ceramic blanks in the open-air burning firewood.
人们推测，最原始的烧制方法是堆烧法，把晒干的陶坯放在露天柴草中烧。
These substances, burning in the open fire or in the simple stoves, can cause indoor air pollution and the pollutants exposure in women and children is more serious.
这些物质在室内明火或功能简单的炉灶中燃烧，造成室内空气污染，尤其是妇女和儿童的暴露最为严重。
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