Zf
abbr. 零频率（Zero Frequency）
🗣️ 情景例句
That's understandable.
那是可以理解的。
Mother's apple pie always tastes delicious.
妈妈做的苹果派很好吃的！
It took the police nearly an hour to get the traffic on the move again.
警察花了将近一个小时才使车辆又开起来。