Target of the investigation is an extinct-burnt area.
调查区为煤层自燃死火区。
His burnt area covered 30 percent of his body surface.
他的烧伤面积达到全身的30%。
The burnt area covered one quarter of the patient's body surface.
病人的烧伤面积占身体表面的四分之一。
The burnt area covered one quarter of the patient's body surface.
病人的烧伤面积占身体表面的四分之一。
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