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5.The satellite also demonstrated how it could provide help to people living in isolated areas where transportation is difficult.
how引导的是一个宾语从句。我们很熟悉的是that引导的宾语从句,而且that常常可以省略。如:We must remember (that)things are easier said than done. (我们必须记住事情都是说起来容易,做起来难。)
用连接代词或副词引导的宾语从句我们也应弄清楚。
provide是一个常用单词,通常可以有如下用法:provide sth. to/for sb.; provide sb. with sth.; provide sb. sth.;provide that…,在前一个单元中,我们已对provide一词有过讲解
6.He was then able to follow the doctor's instructions on how to care for the patient.
句子中的on意思为“关于;有关”,可用about替换
care of 在句子中的意思是“照顾”,可用attend; look after替换。
care for 还可以解释为“担心”,“介意”,“愿意”,可用about替换for.
1)He doesn't care about/for his clothes. (他不讲究衣着。)
2)The old lady cared much for her daughter's safety. (老太太非常为女儿的安全担心。
7.The most common use of telecommunication satellites,however,has been for transmitting telephone calls.however
在本句中做副词用,意思相当于but.但是however和but在用法上是有差异的。however不放在句首或句末时,前后通常都加逗号,而but则不用。请看例句:
1)It is not,however, the only answer to the question. (然而,这不是问题的唯一答案。)
2)I am sorry,but I won't be able to come this time. (很报歉,我这次不能来了。)
8. Telecommunication can make information from around the world available to use quickly and easily, but some people worry that this may be a risk to our privacy.
available是一个形容词,意思是“可得到的;可用的;有效的”。
1)I am sorry those shoes are not available in your size. (很报歉,那些鞋没你的尺码。)
2)If I am not available when you call, leave a message. (你打电话来时如果我不在,请留个言。)
9.We can prevent this from happening by carefully controlling the new technology.
prevent…from…意思为“阻止…发生”,也可用stop…from…或keep…from.From在前两个短语中可被省去。
Nothing can prevent him (from)going there.(什么也阻止不了他去那儿。)
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