例句與造句

1. Digital sound broadcasting is a general term covering a wide range of systems and technologies , including eureka 147 and isdb - t , which are designed to replace frequency modulation ( fm ) broadcasting , digital radio mondiale ( drm ) , a possible successor to amplitude modulation ( am ) , as well as iboc , which is intended to complement the existing am and fm services
   數(shù)碼聲音廣播?是一個統(tǒng)稱，技術上是分為不同的系統(tǒng)和制式，有取代fm廣播的eureka147和isdb - t ，也有針對am廣播的drm ，和可以與amfm并存的iboc等系統(tǒng)，它們都有一個共通點，是現(xiàn)時的收音機并不適用。
2. It's difficult to find amplitude modulation(am) in a sentence. 用amplitude modulation(am)造句挺難的