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APCM Adaptive Pulse Code Modulation 自适应脉码调制 APCM是在PCM基础上,采用量化自适应,使均方量化误差最小的一种调制方法。 APD Avalanche Photo Diode 雪崩光电二极
Broadcast: Jan 14, 2003 The U.S. Post Office Monday issued its first 2) commemorative stamp of the year, honoring Thurgood Marshall, the celebrated civil rights lawyer and the nation's first African A
编程 api(application programming interfaces,应用程序接口) ascii(american standard code for information interchange,美国国家标准信息交换代码) atl: activex template library(active
今天我们要学的词是food stamp。 大家都知道,food是食物,stamp是邮票的意思。两个字加在一起food stamp可不是食物邮票的意思,而是美国政府发给穷人的食品券。 More than 29 million Americans received
Word Power 单词库 1.mail 邮政,邮件 n. mailman 邮差 n. package 包裹 n. express 快递 n. postage 邮资 n. mailbox 邮筒,私人信箱 n. postbox 邮箱 n. 2.letter 信件 n. address 地址 n. zip code 邮政编码 stamp 邮票 n. envel