如何阻止蔓延？
消防队员的及时行动阻止了大火蔓延到大教堂的钟楼。
The timely action of the firefighters prevented the fire from reaching the Cathedral's bell towers.
阻止蕨菜蔓延的一种潜在的廉价和自我维持的方法是引入该植物的天敌。
One potentially cheap and self-sustaining method of halting the spread of bracken is to introduce natural enemies of the plant.
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