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标题: 一个阅读里的语法问题 [打印本页]

作者: songlovegt 时间: 2009-3-29 04:38
标题: 一个阅读里的语法问题

In the 1970’s the process of locating profitable pipes was refined by focusing on the subtle differences between the chemical signatures of indicator minerals found in diamond-rich pipes as opposed to those found in barren pipes.

大家看看 as opposed to those found in barren pipes 作何成分？

是和主句并列吗？即 the process of locating profitable pipes was refined as the process was opposed to those found in barren pipes.

如果是 as 引导的从句当与主句的主语相同时可以省略主语和助动词。和 when, although 用法相同？

作者: uustar 时间: 2009-3-29 05:36
内个，我读这篇的时候，只管看懂意思就没深究了。lz把这个句子拿过来，看了半天我也没明白as引导的是个什么结构，开始觉得像省略be动词的定语从句，但又觉得不对。google了一下，原来as opposed to是个固定搭配，意思是与...形成对照。

作者: songlovegt 时间: 2009-3-29 09:20
多谢LS, 我开始也觉得和主句并列不对，但又一时找不到合适的平行对象。又学了一个语法点。
as opposed to是个固定搭配，意思是与...形成对照。

as opposed to those found in barren pipes 平行对象是 the chemical signatures of indicator minerals found in diamond-rich pipes

those 指代 the chemical signatures of indicator minerals

另 as opposed to sth. (Longman)
used to compare two things and show that they are different from each other

Students discuss ideas, as opposed to just copying from books.

The tax system favors the very rich as opposed to ordinary working people.

Sentences from books, newspapers, etc.

Analysts believe that the healthy results can be attributed to an increase in trade as opposed to interest rate fluctuations.

Another point is to give the medication on a scheduled as opposed to an as-needed basis.

It stumbled commercially, reaching only No. 28, as opposed to the No. 2 peak of the first album.

还有一个问题 as opposed to 可以用 in contrast to/with 替换吗？查了 Longman 感觉可以，请指教

contrast (Longman)
1
[uncountable and countable]a difference between people, ideas, situations, things etc that are being compared
While there are similarities in the two cultures, there are also great contrasts.
contrast between
the economic and social contrasts between the poor and the rich
contrast with
The marble is smooth and polished, making a strong contrast with the worn stonework around it.
by contrast (to/with)
The birth rate for older women has declined, but, by contrast, births to teenage mothers have increased.
in contrast (to/with)
The stock lost 60 cents a share, in contrast to last year, when it gained 21 cents.
(in) stark/marked/sharp etc contrast to something The winter heatwave in California is a stark contrast to the below-freezing temperatures on the East Coast.The spirited mood on Friday was in sharp contrast to the tense atmosphere last week.The approach to learning at this school stands in marked contrast to the traditional methods used at other schools nearby.
2
[countable] something that is very different from something else
The wine used in the sauce is quite sweet, so add dried thyme as a contrast.
contrast to
The red stems of this bush provide a contrast to the drab brown of the rest of the winter garden.

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