Zf
abbr. 零频率（Zero Frequency）
🗣️ 情景例句
As simple as that.
就这么简单。
I'm serious.
我是认真的。
Get him his change! It's easy to say, sir; but look at the bill yourself.
给他找钱！先生，说的倒轻巧，您自己来看看这张票子吧。