flame characteristic

例句：

1. 1. The flame characteristicof the fire is its ability to spreadquickly.
   火焰的特性是它能够迅速蔓延。
2. 2.The combustion characteristic of gasoline is its high energy content.
   汽油的燃烧特性是它的高能量含量。
3. 3. Theflame characteristic of a candle is its softglow.
   蜡烛的火焰特性是它的柔和光芒。