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N-UNCOUNT If you say, for example, that someone is of French extraction, you mean that they or their family originally came from France. 血统 [正式] [with supp]
Her real father was of Italian extraction.
她的生父是意大利裔。
"It could be hitting natural fractures that already exist." Fox notes that toxic gases like benzene,toluene and hexane also accompany natural gas extraction.
VOA: standard.2010.01.02
I'm interested in nonaqueous electrochemistry, so molten salts and polymers, the applied research. First of all, interested in environmentally sound technologies for extraction, refining, recycling of metals.
我对非水溶剂电化学感兴趣,还有熔盐和聚合物,以及应用性研究,首先,对环保型技术提取感兴趣,如金属的提取和精炼,以及循环回收。
We have to invent a process, a chemical extraction process that will make the production of magnesium cheaper so that we will have the opportunity to avail ourselves of energy-efficient materials.
我们必须发明出一种方法,一种化学提炼方法,能够使生产镁变得更便宜,那样我们才有机会,让我们自己用上高效能的材料。
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