Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
Like this.
像这样。
He is wise that is honest.
诚实者明智。
Ask Mr. Wu if you can have some old boxes.
问问吴先生，你能否搞到一些旧箱子。