VOA慢速英语:Educational Technology: Not Just Computers

depend on 依赖,依靠;取决于,随…而定

例句：Whether the game will be played depends on the weather.
      比赛是否举行要看天气而定。

It depends. 是一个独立短语，而不是省略句。意思就是：看情况， for example: A: Will you go to school tomorrow? B: It depends. 你明天会去上学吗？看情况。

2.They can be used for documents or writing or to project video.

be used for被用于……

be used to被用来做某事

例句：The wood is used to make tables.
      这些木头是用来做桌子的。

3.Yet technology can have special importance in some cases.

have special importance拥有非常特殊的重要性。此外需要注意：

be important+be of importance

“be of+抽象名词”，这时的of短语相当于这个名词的同根形容词，作为表语表示主语的性质或特征。of的意思是“具有、具备”等，常用于该结构的名词常见的有of use=useful；of nouse=useless；of importance=important等。如：
 
The matter is of great importance.=The matter is very important.
在形容词前常用very来修饰，在“of+抽象名词”结构中，名词前常用great,much等来修饰。
再如：It is o fgreat importance for college students to master a foreign language.
=Itisveryimportant...对大学生来说，掌握一门外语是很重要的。

The information we received is of a highly confidential nature and relates to national security.
我们收到的信息是高度机密，且关乎国家安全。

4.It stands about half a meter tall and has a blue body and a friendly face with big eyes.

stand half a meter tall高达半米，相当于half a meter high,不过用stand来表示更加形象，更加有动态感。

5.One child who works with it is six-year-old Kevin Fitzgerald. Kevin has developmental dyspraxia; he has difficulty moving his mouth and tongue.

have difficulty doing sth做某事有困难。have difficulty/trouble/problem doing sth这几个短语的用法相同。

例句：We had difficulty (in) carrying out the plan．
      我们执行计划有困难。