Zf
abbr. 零频率（Zero Frequency）
🗣️ 情景例句
He jumps from one job to another.
他经常换工作。
Burn not your house to rid it of the mouse.
投鼠忌器。
the editor was getting impatient, for the magazine would soon go to press.
在此期间，编辑等得不耐烦了，因为杂志马上要付印。