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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。
The extraction process of nucleoprotein and protamine from freshwater fish spermary was studied.
研究淡水鱼精巢中的核蛋白和鱼精蛋白的提取工艺。
Better conservation methods and a focus on fresh fossils could boost DNA extraction from more delicate specimens.
更好的保护方法和对新化石的关注可以帮助我们从更脆弱的标本中提取 DNA 。
Community members may reside temporarily in one of the lower zones to manage the extraction of products unavailable in the homeland.
社区成员可以暂时居住在一个较低的区域,以管理在本土无法获得的产品的提取。
"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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