Search engines⑦

　　Search engines are a type of computer program. The links that you get⑧ are not classified⑨ by subject. These engines search the Internet for you based on the key words you type⑩ in, and choose web pages⑪ for you which contain the words you ask for⑫. The contents they search have not been evaluated⑬. This means that the information has never been checked - it could be reliable⑭， true information or false⑮ information written by a person without qualifications⑯ or someone who does not have solid⑰ facts. The links you obtain from the search engines⑱ go to full articles or pages. This requires you to be⑲ patient as you have to read the information to decide whether it is linked to⑳ what you are researching. Examples of famous search engines are Google, Yahoo and Baidu. You can also go to the www. thesearchenginelist. com website and check their list of search engines.

　　Subject directories

　　Subject directories are built by humans. Someone has combed\s\up1(21(21) through pages and links and selected all those that are in the directory\s\up1(22(22). The results of your search are divided into specific\s\up1(23(23) subject categories\s\up1(24(24). You do not get the full pages to read. Instead, you get a bunch of\s\up1(25(25) titles of articles or pages and, sometimes, a short summary of the information they contain. You need to decide whether the information is useful to you\s\up1(26(26) on that basis\s\up1(27(27). Most often, the information in subject directories has been evaluated, and someone has decided that the information is relevant\s\up1(28(28) and correct. Being relevant and correct\s\up1(29(29)， though, does not equal being up to date. ⑦search engine n．(因特网)搜索引擎

⑧that you get 是定语从句，修饰先行词the links。

⑨classify/'klæsIfaI/vt.分类，归类

classify by 按照......进行归类

⑩type/taIp/vt.(用计算机或打字机)打字

⑪web/web/n.网状物，网络　web page n．网页

⑫which引导定语从句，修饰web pages；其中you ask for也是定语从句，修饰the words，引导词that/which被省略了。

⑬evaluate v．评估，评价　⑭reliable adj.可信的，可靠的

⑮false adj.虚假的，伪造的；人造的，错误的

⑯qualification/ˌkwɒlIfI'keIʃn/n.资格，资历

without qualifications 没有资格

⑰solid本意为"固体(的)"，此处引申为"可靠的"。

⑱you obtain from ...是定语从句，修饰the links。

⑲require sb. to do sth.要求某人做某事

⑳be linked to 连接到

\s\up1(21(21)comb/kəʊm/vt.仔细搜索；梳理(头发) n．梳子

comb (through) sth. (for) 仔细搜寻

\s\up1(22(22)that 引导定语从句，修饰those，that在从句中作主语。

\s\up1(23(23)specific/spə'sIfIk/adj.具体的，明确的；特定的；独特的

\s\up1(24(24)category/'kætəgərI/n.类别，种类

\s\up1(25(25)bunch/bʌntʃ/n.串，束　a bunch of 一串，一束；大量

\s\up1(26(26)whether引导宾语从句。

\s\up1(27(27)on that basis 在那个基础之上

on the basis of 以......为基础

\s\up1(28(28)relevant/'reləvənt/adj.紧密相关的，切题的；有价值的

be relevant to与......相关联，与......切题

\s\up1(29(29)动名词短语作主语，谓语动词用单数形式。 搜索引擎

主题目录

主题目录是由人建立的。有人已将页面和链接整个搜索了一遍，选出了所有那些列在目录中的内容。你搜索的结果会被分成特定的主题范围。你阅读的并非完整的页面。相反，你看到的只是很多文章的标题或页面的标题，有时候是它们所含信息的概要。在此基础上，你得判定这些信息对你是否有用。大多数情况下，主题目录里的信息是经过评估的，有人已