Both sides are expressing concern over North Korean statements on Friday that Pyongyang is continuing to extract plutonium from spent nuclear fuel for material useable in weapons.

VOA: standard.2009.09.06

Because it's identified with the Spanish empire, with Spain, which not only wanted to extract taxes and to extract taxes and other revenue from its most prosperous province, but wanted to force people to remain Catholic.

因为天主教是与西班牙帝国联系在一起的,西班牙不仅从这个最富有的省份,榨取税收和其他收入,还想强迫人民保持天主教信仰

耶鲁公开课 - 欧洲文明课程节选

So in the first week we run a section called from strawberries to gene therapy where we talk about DNA, extract DNA, you can play with the DNA of an organism and we can think about how to use DNA for other purposes.

第一周组会的主题是从草莓到基因疗法,主要讨论DNA和DNA的提取,使你们对有机组织的DNA有直观的认识,并思考DNA的其它应用

耶鲁公开课 - 生物医学工程探索课程节选