Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
Just relax and enjoy it.
放轻一点 好好地享受它。
He who stands alone has no power.
孤掌难鸣。
We can have our coffee there.
我们可以在那里喝咖啡。