作火焰講的時候應該是可數名詞。
例如：
The heat from the flames was so intense that roads melted.
火焰的熱度如此高以至於路面融化了。
The flames grew larger as the fire spread.
火勢蔓延，火焰越來越高。
When the fire engine arrived the house was already in flames (= burning).
消防車趕到時，房屋已是壹片火海。
作火焰講的時候應該是可數名詞。
例如：
The heat from the flames was so intense that roads melted.
火焰的熱度如此高以至於路面融化了。
The flames grew larger as the fire spread.
火勢蔓延，火焰越來越高。
When the fire engine arrived the house was already in flames (= burning).
消防車趕到時，房屋已是壹片火海。