Forest fires were raging out of control.

森林大火迅速蔓延，失去了控制。

《牛津词典》

As one of natural fires, its mechanism is very complex and difficult to control.

雷击火作为天燃火源是一种难以控制的自然现象，其形成机理极为复杂。

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As one of natural fires, its mechanism is very complex and difficult to control.

雷击火作为天燃火源是一种难以控制的自然现象，其形成机理极为复杂。

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