火势很快蔓延
The fire spread quickly.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
火势迅速蔓延，火焰窜起100英尺高，很快烧遍整个房子。
It took hold incredibly quickly, with flames 100ft high. It ripped through the house very quickly.
youdao
火势蔓延得很快。
The fire spread itself quickly.
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