Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
He will say so, and you may disagree with him too - politely, of course!
你也可能会不同意他的看法——当然，你应该礼貌地告诉他。
You betrayed me!
你出卖我！
Do you want one?
你想要一块吗？