通信英語教程(ppt32)-電子電信(完整版)
【正文】 特的字符。 Now consider a character consisting of 8 information bit plus 4 control bits. 7. PCM是用以將模擬信號轉換成數(shù)字信號的一種重要方法。 somebody, anybody, everybody, nobody。插入語位置不定，位于句首或主語之后較為常見。 1. 字符中的比特位并非全部用于表示數(shù)據(jù)。 ?分詞短語作定語，位于所修飾名詞之后。 ? Instruments here are not good. 這里的儀器并非都是好的。 It is digital transmission that provides a powerful method for overing the noisy environment. 2. 數(shù)字傳輸正是為克服這種噪聲環(huán)境提供了一種有力的方法。 2. 數(shù)字傳輸正是對于克服這種噪聲環(huán)境提供了一種有力的方法。 介詞短語 for doing something 作后置定語，表示目的，意思為用于 ? 的。還有其它的情況，課文中遇到時在講。 ＊ of the most interest to ? , 對 ? 最感興趣的 of interest = interesting of importance = important ＊ 名詞＋逗號＋同位語 +逗號 進行說明 An American, Edison, invented the first small electric lamp. ＊ g, the acceleration of gravity at the earth’s surface, has the value 32 ft/sec2. ＊ 1. 正是數(shù)字傳輸為克服這種噪聲環(huán)境提供了一種有力的方法。 漢譯英練習：（除第 8題外每題只用一個謂語動詞） 1. 正是數(shù)字傳輸為克服這種噪聲環(huán)境提供了一種有力的方法。 The speech signal is a analog one, and we can perform its digital transmission by sampling, quantizing and coding. UNIT 2 部分否定與完全否定：對于集合中的個體， 否定動詞為部分否定，否定名詞為完全否定。 ?Matters consist of molecules and molecules of atoms. ?The earth attracts the moon and the moon the earth. ?The meter is the standard for length, the gram for weights. ?Electrons are injected into the P region, and holes into the N region. samples the next N bits at their centers, using a clock using a clock generated locally by the receiver 嚴格的語法修飾： 分詞作定語 ?單個分詞作定語，位于所修飾名詞之前。 7. PCM是用以將模擬信號轉換成數(shù)字信號的一種重要方法。 PCM is a important method used to convert an analog signal into a digital one. UNIT 3 形容詞短語作后置定語： ? a form suitable for transmission over these facilities. 常見的有： suitable for ? , similar to ? , capable of ? , different from ? , available to ? , able to (do ? ), necessary to (do ? ), ? a LSI chips available to the design engineer ? motion parallel to the earth’s surface ? a quantity greater than any number ? something as small as a worm 插入語 插入語與其他部分沒有直接語法關系，一般有逗號隔開，但也可以沒有。 someone, anyone, everyone, no one 等 ?Everything electronic will be done digitally. ?In what follows we shall learn that there is nothing mysterious. ?There is something peculiar that should be noted about the left side of the graph. ?Coherent osci
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