Hdf
abbr. high-frequency direction finder 高频测向器
🗣️ 情景例句
They're both very good buys.
这两栋都是价格便宜的。
Soon learnt,soon forgotten.
学得快，忘得快。
In that case, we'd like cash on receipt of invoice.
这样的话，您在收到帐单时请付现。