炎

例句：

1. 1.The summer heat is unbearable.
   夏天的炎热让人难以忍受。
2. 2. The fire burned for hours before it was extinguished.
   火燃烧了几个小时才被扑灭。
3. 3. She has a passion for music and often sings passionately.
   她对音乐有激情，经常热情地唱歌。