Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
Everything is shaping up well.
一切进展顺利。
We want to cancel the contract because of your delay in delivery.
由于贵方交货拖延，我方要求取消合同。
Oh! Well, for that, you'd better find an English pen friend.
哦！那你最好为此找一个英文的笔友。