例句與造句

1. Units : megahertz ( mhz ) am ( amplitude modulation ) , 200 and up are for military use , but are staffed by the same civil controllers
   單位：兆赫，調(diào)幅， 200以上為軍用，亦為民航管制員執(zhí)勤。
2. It's difficult to find am (amplitude modulation ) in a sentence. 用am (amplitude modulation )造句挺難的