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长难句看不懂的地方是之前有个bywhich还来个byproducers什么意思Animportantfactorinamarket-orientedeconomyisthemechanismbywhichconsumerdemandscanbeexpressedandrespondedtobyproducers.

题目详情
长难句看不懂的地方是之前有个by which还来个by producers什么意思
An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers.
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答案和解析
by which修饰mechanism,这里的by是指一种途径;
by producers 中的by 就是单纯的一个介词了
“在市场导向型经济中/一项重要因素/是消费者的需求会被制造商所传达与响应/的这一机制。”