Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
You just relax with Grandpa.
你只要放轻 陪爷爷就行了。
It's a shame the weather is so bad.
真遗憾，天气如此糟糕。
The cupboards in her kitchen were full of things she did not need.
她厨房的橱柜中放满了她不需要的东西。