專(zhuān)業(yè)英語(yǔ)

——SpecializedEnglish

Unit4：第二部分通信技術(shù)Common-ChannelSignaling——公共信道信令NEWWORDSANDPHRASES

detachvt.分離,分開(kāi),移出constraintn.制約,限制,約束inaudibleadj.聽(tīng)不見(jiàn)的,不可聞的quantumn.量,數(shù)量,量子obviatevt.消除,免除crucialadj.關(guān)鍵的,關(guān)系重大的schematicadj.圖解的,概略的,示意的formulatevt配置;按配方制造;公式化;格式化terminationn.終端（裝置）,終止,終點(diǎn)abstractionn.分離,提取refinementn.精制,明確表達(dá),微調(diào)delimitationn.定界,劃界,界限multiplicityn.多樣,多樣性NEWWORDSANDPHRASES

flexibilityn.靈活性expandabilityn.可擴(kuò)充性tailorv.修整,制造matchv.與…相適應(yīng),和…相符,匹配…noden.節(jié)點(diǎn),結(jié)點(diǎn)exploitvt.利用,使用,發(fā)揮,開(kāi)發(fā)optimizev.最優(yōu),使最佳；確定…的最佳特性resiliencen.彈性,回彈能力,恢復(fù)力databasen數(shù)據(jù)庫(kù)failuren.故障,失敗bearern.載體,運(yùn)載工具,承載線路（信道）overheadn.總開(kāi)銷(xiāo)intactadj.原封不動(dòng)的,無(wú)損傷的NEWWORDSANDPHRASES

associatedadj.關(guān)聯(lián)的,連帶的,有聯(lián)系的non-associatedadj.非關(guān)聯(lián)的quasi-associatedadj準(zhǔn)關(guān)聯(lián)的inparallelwith與…平行,和…同時(shí),伴隨著…laydown規(guī)定,設(shè)計(jì)atthetime當(dāng)時(shí)Network-managementsignalswillbefacilitatedbythefactthattheycanbemadeavailablefromtherepertoireandbythespeedandflexibilityofthesignalingnetwork.that：引導(dǎo)同位語(yǔ)從句,說(shuō)明“thefact”.把同位語(yǔ)從句可譯為與主句并列的一個(gè)分句?；谛帕罹W(wǎng)的（高）速度和方便性，網(wǎng)管信號(hào)（傳送）方便.TEXTImportantly,itobviatestheneedformostofthepercircuitsignalingequipmentwhichisnecessarywhenchannel-associatedsignalingisused.formostof…equipment:作定語(yǔ)修飾“theneed”；which:引導(dǎo)定語(yǔ)從句,修飾“thepercircuitsignallingequipment”；“when”引導(dǎo)時(shí)間狀語(yǔ)從句。重要的是，共路信令省略了大部分的噪聲抑制電路信令設(shè)備，這些設(shè)備是當(dāng)使用隨路信令時(shí)是必需的。Beinginterprocessor,itisindependentofswitchortransmissiontechnology；sonewsignallingsystemsdonotneedtobeintroducedinparallelwitheveryotherdevelopmentintelephony.Beinginterprocessor:分詞短語(yǔ)作原因狀語(yǔ)；

inparallelwith…intelephony:作狀語(yǔ),表示伴隨情況。全句可譯為“因?yàn)楣猜沸帕钍强缣幚砥鞯?，它?dú)立于交換或傳輸技術(shù)；所以新的信令系統(tǒng)不需要和電話系統(tǒng)的每個(gè)發(fā)展同步。”Aprotocolstackthusallowsthedesignertodividethefunctionsrequiredforthesignalingsystemintoseparateblocks,eachofmanageableproportionsandwithitsinformationexchangewiththoseaboveandbelowitdefined,sothateachblockcanbedevelopedinisolation.requiredforthesignallingsystem:過(guò)去分詞短語(yǔ)作定語(yǔ),修飾“thefunctions”；Aprotocol…separateblocks與eachof…itdefined為兩個(gè)并列分句sothat:引導(dǎo)結(jié)果狀語(yǔ)從句,全句是并列復(fù)雜句。因此，協(xié)議棧允許設(shè)計(jì)者把信令系統(tǒng)所需的功能劃分成單獨(dú)的模塊，每個(gè)可管理部分和它的上、下層之間進(jìn)行信息交換，所以每個(gè)模塊可以單獨(dú)的進(jìn)行開(kāi)發(fā)。

Forinstance,ifalowerlayerisresponsibleforcorrectingerrorsinthetransmissionofmessages,thenthelayeraboveitcanassumethatallmessagesitsendsorreceivesviathelowerlayerareerror-free.If:

引導(dǎo)條件狀語(yǔ)從句itsendsorreceives…layer:為省掉“that”的定語(yǔ)從句,“that”在從句中作賓語(yǔ),代表“allmessages”。例如，如果低層負(fù)責(zé)信息傳輸中的錯(cuò)誤糾正，則它的上層就會(huì)假設(shè)它通過(guò)低層傳輸或接收的信息是沒(méi)有錯(cuò)誤的。Thiswasnotpossiblewiththeearlierchannel-associatedsignalingsystem,whichweretailoredtomatchthetransmissionandswitchingsystemswithwhichtheyworked,andwhosemessagerepertoireswereextremelylimited.which:引導(dǎo)的定語(yǔ)從句修飾“theearlierchannel-associatedsignallingsystem”；whose:引導(dǎo)的定語(yǔ)從句修飾“theearlier···signalingsystem”。翻譯時(shí)可把定語(yǔ)從句拆譯成并列分句。tailoredto…：根據(jù)...調(diào)整。這在早期的隨路信令系統(tǒng)中