Ffes
abbr. Foam Fire Extinguishing System 泡沫灭火系统
🗣️ 情景例句
Hmmm. It is wrong.
嗯嗯。是不对劲。
It is easier to descend than to ascend.
下降容易上升难。
As he hated army life, he decided to desert his regiment.
他讨厌军旅生活，决定逃离所在部队。