neutral burning

例句：

1. 1. The fire was neutralburning, so it didn't spreadquickly.
   火是中性的，所以它没有迅速蔓延。
2. 2. Thechemical reaction is neutral burning, which means it doesn't produce any harmful byproducts.
   化学反应是中性的，这意味着它不会产生任何有害的副产品。
3. 3. Thescientist used a neutral burningagent to prevent the fire fromspreading.
   科学家使用了中和剂来防止火灾蔓延。