Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
But I was lucky enough to have a career as a music teacher
但我很幸运， 有一个音乐教师的事业
We have drapes for the living room,but we need kitchen curtains.
我们有客厅窗帘，但是我们需要厨房窗帘。
The Maori have insisted on keeping their own customs and way of life.
毛利人一直坚持保留他们自己的风俗习惯与生活方式。