Zf
abbr. 零频率（Zero Frequency）
🗣️ 情景例句
Sorry, I've got people coming over tonight.
很抱歉，今晚有客人要来。
It's my treat this time.
这次我请客！
They have nothing to sell and require nothing from others.
他们既不出售任何东西，也不需要从别人那儿得到任何东西，