03-2 3.2 Search Tools.pptx

第1页：3.2 生词表

第2页：3.2 生词表（续）

第3页：3.2 常用短语

第4页：3.2 缩略语表

第5页：网络拥有令人难以置信的丰富资源

网络拥有令人难以置信的丰富资源，它可以为任何想得到的主题提供相关信息。你想要旅行吗？或是写一篇经济论文？或是查找影讯？寻觅多年失去联系的老朋友？与这些问题相关的信息，或是更多的其他信息都会由网络提供给你。

The Webcanbean incredible resource providing information on nearly any topic imaginable. Are you planning a trip? Writing an Economics paper? Looking for a movie review? Trying to locate along-lost friend? Information sources related to these questions, and much, much more are available on the Web. 3.2 Search Tools

第6页：具有20多亿网页并且每天在增加

Withovertwo billion pages and more being added daily, the Webisa massive collection of interrelated pages. Withsomuch available information, locating the precise information you need can be difficult. Fortunately, a number of organizations called search services or search providers can help you locate the information you need.

具有20多亿网页并且每天在增加，Web已经成为了一个汇集众多相关网页的巨大宝库。有这么多可用信息，想要找到你所需要的精确信息就非常困难。幸运的是，一些称为搜索服务或搜索提供商的组织可以帮你定位所需的信息。

第7页：它们拥有一个庞大的数据库

They maintain huge databases relating to information provided on the Webandthe Internet. The information stored at these databases includes addresses, content descriptions or classifications, and keywords appearing on Webpagesand other Internet informational resources. Special programs called agents, spiders, orbots continually look for new information and update the search services databases.

它们拥有一个庞大的数据库，所有存储在数据库中的数据都是Web或互联网提供的信息，包括地址、内容概述或分类、以及出现在Web页面和其他网络资源中的关键字。一些专用的程序，如代理程序、网络蜘蛛程序或网络机器人，它们能够不断地寻找新信息，并升级搜索服务的数据库。

第8页：搜索服务提供的专用程序叫搜索引擎

Additionally, search services provide special programs called search engines that you can use to locate specific information of the Web.

另外，搜索服务提供的专用程序叫搜索引擎，你能利用它定位网页中的具体信息。

第9页：搜索引擎是专用的程序

语言点分析：复合句，that assist you in locating information on the Webandthe Internet是定语从句，修饰specialized programs。英译汉时，定语从句不一定翻译成定语，可采用分译法。

Search Engines

[1]Search engines are specialized programs that assist you in locating information on the Webandthe Internet. To find information, you go to the search service's Website and use their search engine. Yahoo’s search engine, like most others, provides two different search approaches.

搜索引擎

搜索引擎是专用的程序，帮助用户定位Web和Internet上的信息。你可以进入提供搜索服务的Web站点使用其搜索引擎来查找信息。例如Yahoo的搜索引擎，和其他大多数网站一样，提供两种不同的搜索方式。

第10页：在关键词搜索引擎当中

Keyword Search

Inakeyword search, you enter a keyword or phrase reflecting the information you want. The search engine compares your entry against its database and returns a list of hits or sites that contain the keywords. Eachhit includes a hyperlink to the referenced Webpage (or other resource)along with a brief discussion of the information contained at that location.

关键词搜索引擎

在关键词搜索引擎当中，输入可以反映所查信息的一个关键字或关键词，搜索引擎通过和数据库中的信息进行比较，然后返回与其匹配的热点链接或者站点。每个热点包含一个到带有简要介绍的Web页（或其他资源）的链接。

第11页：许多搜索都会返回大量的热点链接

Manysearches result in a large number of hits. Forexample, if you were to enter the keyword travel, you would get over a thousand hits.[2]Search engines order the hits according to those sites that most likely contain the information requested and present the list to you in that order, usually in groups often.

语言点分析：本句是复杂句，order和present是主句中并列的谓语动词。

许多搜索都会返回大量的热点链接。例如，如果输入关键字“旅游”，你会得到一千多个热点。搜索引擎根据需求信息与网站内容的匹配程度对搜索结果进行排序，并且按照这个顺序将相关信息列出来，通常每组10个。

第12页：大多数搜索引擎也提供诸如人文艺术

Directory Search

Most search engines also provide a directory or list of categories or topics such as Arts& Humanities, Business& Economics, Computers& Internet. Inadirectory search, also known as index search. Youselecta category that fits the information that you want. Another list of subtopics relates to the topic you selected appears.

目录式搜索引擎

大多数搜索引擎也提供诸如人文艺术、商业经济和计算机Internet之类的目录或分类主题列表。在目录式搜索（也称之为索引式搜索）引擎中，选择了一个与你想要的信息相匹配的类别，与之相关的子类别列表会显示。

第13页：用户可以继续以这种方式缩小搜索范围直到列

You select the subtopic that best relates to your topic and another subtopic list appears. You continue to narrow your search in this manner until a list of Websites appears. This list corresponds to the hitlist previously discussed.

用户可以继续以这种方式缩小搜索范围直到列出一系列站点，这个列表与前面讨论过的热点列表相对应。

第14页：如果你搜索一般的信息

一般来说，如果你搜索一般的信息，可使用目录式搜索引擎。例如，查询关于音乐的信息，以目录式搜索引擎的人文艺术类开始。如果搜索专用的信息，使用关键词搜索引擎。例如，查询一个专用的MP3文件，在文本选择框中输入专辑名称和/或艺术家姓名进行关键词搜索。

Asageneral rule, if you are searching for general information, use the directory search approach. Forexample, to find general information about music, use a directory search beginning with the category Arts& Humanities. Ifyoua researching for specific information, use the keyword approach. Forexample, if you were looking for a specific MP 3 file, use a keyword search entering the album title and/or the artist’sname in the text selection box.

第15页：最近一项NEC研究机构的调查表明

最近一项NEC研究机构的调查表明，任何一个搜索引擎都仅包含Web信息资源的一部分。因此，当你检索一个重要的主题时，极力推荐使用多个搜索引擎，或者使用一个特殊的称之为Metasearch的搜索引擎。

Arecentstudy by the NECResearch Institute found that anyone search engine includes only a fraction of the informational sources on the Web. Therefore, it is highly recommended that you use more than one search engine when researching important topics. Or, you could use a special type of search engine called a metasearch engine.

第16页：有一种搜寻某个主题的方法

Metasearch搜索引擎

有一种搜寻某个主题的方法是访问多个独立的搜索引擎Web站点。在每个站点输入搜索指令，等待反馈的热点链接信息出现，检查列表，访问选出的站点。这样会占用很多时间，并且不同的搜索引擎返回重复信息也不可避免。Metasearch搜索引擎提供了另外一种方案。

Metasearch Engines

Onewayto research a topic is to visit the Website for several individual search engines. Ateachsite, enter the search instructions, wait for the hits to appear, review the list, and visit selected sites. This process can be quite time-consuming and duplicate responses from different search engines are inevitable. Metasearch engines offer an alternative.

第17页：Metasearch搜索引擎

Metasearch搜索引擎是一个同时自动提交搜索信息给多个搜索引擎的程序，可以接收搜索结果，去除重复部分并且将热点链接排序，最后将编辑好的结果提交给用户。在Web上有多个Metasearch站点，其中最著名的一个是Metacrawler。

Metasearch engines are programs that automatically submit your search request to several search engines simultaneously. The metasearch engine receives the results, eliminates duplicates, orders the hits, and then provides the edited list to you. There are several metasearch sites available on the Web. Oneofthebest known is Metacrawler.

第18页：专用搜索引擎重点查询专用主题的Web站点

专用搜索引擎

专用搜索引擎重点查询专用主题的Web站点，通过缩小搜索范围来潜在地节省用户时间。例如，你正研究一篇关于时装工业的论文，你可以从像雅虎（Yahoo）一样的普通搜索引擎开始。或者，你可以进入到关于时装的专用搜索引擎。

Specialized Search Engines

Specialized search engines focus on subject-specific Websites. Specialized sites can potentially save you time by narrowing your search. Forexample, let's say you are researching a paper about the fashion industry. You could begin with a general search engine like Yahoo! Or, you could go to a search engine that specialized specifically in fashion.

第19页：习题3.2 一 判断正误

习题3.2 一 判断正误：根据课文内容判断下列说法正误。

Put“true”or“false”in the brackets for the following statements according to the passage.

1. ()Usually, many searches result in a large number of hits, and search engines list them randomly on the Website.
2. ()Botsarealso known as agents and spiders.
3. ()Most search engines provide only one search approach, namely keyword search.
4. ()Keywordsearc his more convenient than directory search.
5. ()Search engines help you locate information on the Web.
6. ()Specialized search engines focus on subject-specific Websites.
7. ()Eachhit includes a hyperlink to the referenced Webpagealong with a brief discussion of the information contained at that location.
8. ()Inordertouse keyword search, you only need to enter word like“music”, and search engine will list all interrelated information from databases.

第20页：习题3.2 二 练习

习题3.2 二 练习：根据课文内容完成下列练习。

Fillinthe blanks according to the passage.

1. The________can be an incredible resource providing information on nearly any topic imaginable.
2. Botsareused for looking for new information and________the search services’databases.
3. ________are specialized programs that assist you in locating information on the Webandthe Internet.
4. Inadirectory or________search, you select a category that fits the information you want.
5. Asageneral rule, keyword search is good for________information, while directory search is good for________information.
6. ________engines are programs that automatically submit search requests to several search engines simultaneously.
7. ________are the list of sites that contain the keywords of a keyword search.
8. Metasearch engine receives the results,________duplicate sites,________hits, and then provides the edited list to you.

第21页：习题3.2 三 翻译

习题3.2 三 翻译：将下列单词和短语译成中文。

Translate the following words and expressions into Chinese.

1. search engine
2. keyword search
3. directory search
4. duplicate
5. specialized search engine
6. spider
7. NEC
8. fashion industry
9. update
10. bot