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求助og11一个解释

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楼主
发表于 2009-9-10 21:05:00 | 只看该作者

求助og11一个解释

A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.

og:解释说called protin-induced X-ray emission should be placed next to a technique and should not be set off by commas; relative clause introduced by which incorrectly and illogically modifies emission.
定语从句which为什么要去掉逗号,我没看懂,求助~~

沙发
发表于 2009-9-10 21:34:00 | 只看该作者

人家是说

called protin-induced X-ray emission 应该放在a technique 旁边,同时不能和a technique 用逗号隔开。

和那个which没啥关系。。。。。

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