Zf
abbr. 零频率（Zero Frequency）
🗣️ 情景例句
By this time next week we shall be in London.
下星期的这个时间我们将在伦敦。
Do you enjoy watching your babies grow into people?
目睹子女长大成人是一件快乐的事情吧？
On his return to India he had the chance to travel to South Africa to work on a law case.
一回到印度，他就得到一个去南非办理一桩法律案件的机会。