Multi - frequency的用法和樣例：
例句
- An underwater acoustic communication scheme using time delay and multiple frequency modula-tion technique is presented in this paper.
研究了一種采用脈沖時(shí)延差和多頻碼元組合編碼的水聲通信技術(shù)。 - While single frequency tones worked on certain phone routes, the most common signaling on the then long distance network used Multi-Frequency tones.
而某些單頻音調閃耀電話(huà)線(xiàn)最常見(jiàn)的則長(cháng)途信令網(wǎng)采用多頻音調。
