flames quickly spread
火焰迅速蔓延
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A spokesman for the Beijing fire Brigade says flames spread quickly throughout the building-which was still under construction-because sprinkler systems and fireproofing were not yet in place.
北京消防队的发言人表示，大火延烧整栋大楼的速度很快，因为这栋大楼还在盖，里头的洒水系统和防火设施都还没完成。
youdao
When the pyrotechnics were set off, the ceiling caught fire, state officials said, and the flames spread quickly.
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