Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
It's his first venture into business.
他初涉商界。
Oh? Where were you?
哦，上哪儿去了？
they become merged in the sea, and painlessly lose their individual being.
汇入大海；毫无痛苦地失去了自我的存在。