Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
With two bedrooms?
有两间卧室吗？
We had a good time.
我们玩的很开心。
Where are you going tomorrow? You said that you hoped it would be fine.
你明天打算去哪儿？你说你希望明天是个好天呢。