The PKK,which has bases in northern Iraq, conducts frequent raids inside Turkey, provoking periodic Turkish cross-border reprisals.

VOA: standard.2009.03.23

DNA also has this sort of combinatorial system where you have a finite number of, I guess, bases or amino acids that could combine to a possible infinity of strings of DNA strings.

脱氧核糖核酸也拥有这种组合系统,你的生物基础或氨基酸数量是有限的,但却能组合出,几乎无限的脱氧核糖核酸螺旋结构

耶鲁公开课 - 心理学导论课程节选

You can say a polymer of DNA, for example, is four bases long, that means it has four of these repeat units and they go in the sequence from 5' to 3' of .

打个比方,要描述一个由,四个核苷酸单位构成的寡聚DNA,就是说它由四个核苷酸单位构成,并且从5'端到3'端的顺序为

耶鲁公开课 - 生物医学工程探索课程节选

Recently,AMISOM has begun taking a more active role in the conflict, patrolling far beyond their bases, and at one point, fighting alongside government forces.

VOA: standard.2009.08.21

The country's presumptive new Prime Minister Democratic Party of Japan leader Yukio Hatoyama - has called for a review of the bases agreement and the closure of the Futenma facility altogether.

VOA: standard.2009.08.31

In an attempt to show they are serious about supporting a solution to the protracted Cyprus problem, Britain has renewed an offer to cede about half the territory of its bases in Cyprus.

VOA: standard.2009.11.11