Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
OK. Right. Uh, We're at La Traviata restaurant in North Beach.
是，对。我们在North Beach的La Traviata餐厅。
The two warring countries refused to negotiate.
这两个交战国拒绝谈判。
Specially-made lanterns are hung outside each house to help the dead to find their way.
特制的灯笼挂在各家的门外，为的是帮助亡灵看清道路。