【正文】 mediately and even place it on your own Web page. Digital video cameras record motion digitally on a disk or in the camera′s memory(See Figure 762). Webcams are specialized digital video cameras that capture images and send them to a puter through the Inter and they are used to broadcast weather and traffics (See Figure 77). Figure 751 Figure 752 Figure 761 Figure 762Figure 78Figure 77 Audioinput devices convert sounds into a form that can be processed by a puter. The most widely used audioinput device is the microphone(See Figure 78)． A microphone, a sound card and special software make up a voice recognition system. The voice recognition system allows users to operate the puter and to create documents by using voice mands. What is Input? Notes: 1． “ Keyboards convert numbers, letters and special characters that people understand into electrical signals that are sent to and processed by the system unit.” 本句中， “ convert… into…” 意為：將 …… 轉(zhuǎn)化為 …… ；兩個 “ that”引導(dǎo)定語從句分別修飾 “ special characters”和 “ electrical signals”。 本句意為：鍵盤將人能夠理解的數(shù)字、字母和特殊符號轉(zhuǎn)化為計算機(jī)系統(tǒng)能夠發(fā)送和處理的信號。 本句意為：鼠標(biāo)有兩個或幾個按鍵，用于選擇指令和控制監(jiān)視器上顯示的信息。 “ Which”引導(dǎo)定語從句修飾 “ the puter”； “ tell the electronic cash register the price of every product”意為告訴電子收款機(jī)每種商品的價格。 4． “ Digital cameras are different from traditional cameras in that images are recorded digitally on a disk or in the camera′s memory rather than on film.” 本句中， “ in that”意為：在于 …… ， “ rather than”意為： “ 而不是 ……” 本句意為：數(shù)碼相機(jī)與傳統(tǒng)相機(jī)不同之處在于數(shù)碼相機(jī)照出的圖像以數(shù)碼形式記錄在磁盤上或相機(jī)的存儲器中而不是在膠片上。在句中做定語，修飾一個名詞或代詞，被修飾的名詞詞組或代詞即先行詞。限制性定語從句是先行詞不可缺少的部分，去掉它主句意思往往不明確；非限制性定語從句是先行詞的附加說明，去掉了也不會影響主句的意思，它與主句之間通常用逗號分開。輸入輸出設(shè)備充當(dāng)人機(jī)之間的翻譯工具。用戶使用系統(tǒng)程序或應(yīng)用程序工作時就是在進(jìn)行輸入。最常用的輸入設(shè)備包括鍵盤、鼠標(biāo)、掃描儀、數(shù)碼相機(jī)、數(shù)碼寫字板和聲音識別設(shè)備。 鍵盤把數(shù)字、字母和特殊的字符轉(zhuǎn)換為電信號由計算機(jī)系統(tǒng)裝置來處理。 定點輸入設(shè)備提供舒適的人機(jī)界面。 鼠標(biāo)有兩個或多個按鈕用來選擇命令和控制監(jiān)視器上顯示的信息。機(jī)械鼠標(biāo)是傳統(tǒng)和最廣泛使用的類型。光電鼠標(biāo)沒有滾輪而是通過放射和感知光來探測鼠標(biāo)的活動，可以用于任何表面。 What is Input? 掃描儀讀取文檔和圖形、圖像，然后把讀入信息轉(zhuǎn)換為計算機(jī)系統(tǒng)能夠處理的形式。光電掃描儀復(fù)制彩色文本和圖像。字符和標(biāo)志識別裝置能夠識別特殊的字符和標(biāo)志，屬于專業(yè)設(shè)備。 圖像抓取設(shè)備用于創(chuàng)建或抓取原始影像。數(shù)碼相機(jī)與傳統(tǒng)照相機(jī)的區(qū)別在于圖像以數(shù)字化形式復(fù)制在磁盤上或相機(jī)內(nèi)存中而不是膠片上。數(shù)碼攝像機(jī)將動畫以數(shù)字的形式存在磁盤上或攝像機(jī)內(nèi)存中。 聲頻輸入設(shè)備將聲音轉(zhuǎn)換為計算機(jī)能夠處理的形式。麥克風(fēng)、聲卡和特殊的軟件組成聲音識別系統(tǒng)，讓用戶能夠運行計算機(jī)并用聲音指令創(chuàng)建文檔。兩種著名的聲音識別系統(tǒng)是Dragon System的 Naturally Speaking 和 IBM公司的 Via Voice. What is Input? Reading Selection: Making Connections To connect online, your puter must be equipped with a modem, a device that translates the digital signals from your puter into analog signals that can travel over a standard phone line. Those are the scratchy sounds you hear from a modem39。s serial port (external). These days, almost all puters e equipped with an internal modem. But if you need to buy a modem for an older puter, consider purchasing an external one for two reasons. Firstly, they are much easier to install. Secondly, occasionally your modem will freeze and need to be reset. If your modem is external, you can simply turn it off and on again. If it39。ll need a serial modem cable. The cables are usually not included when you buy a modem because there are several different sizes available. These can be purchased at any puter store where modems are sold. Most likely, your puter will have a connector on the back labeled serial, or with the IOIOIO icon. This connector es in a variety of formats: 9, 15, or 25 pins. If you only have one of these ports, it will probably be COM1. If you have two, one will be COM1, and the other will be COM2. After you plug in your modem, you can sign up for Inter Service. What is Input? Usually your setup program will try and find your modem and its COM port. If it can39。t know, the easiest thing to do is trying them all. Even if you only have two serial ports, you may be able to select one of f