Up to the present, no general formula, covering all kinds of multiple equilibrium systems of mixed acids and bases has appeared in chemical literature.

目前在化学文献中还没有一个能够包括各种混合酸碱的复杂体系的通用计算公式。

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The result showed that two - aniline - two schiffs bases has bigger nonlinear optical coefficient. It provides the theory foundation for go further research on good nonlinear optical materials.

结果表明：二苯胺双席夫碱类化合物具有较大的非线性光学系数，从理论上为进一步探索优质非线性光学材料提供依据。

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A switch-hitter, he has very good speed on the bases.

一个左右手均能击球的棒球运动员，他的跑垒速度很快。

《柯林斯英汉双解大词典》

The key transit route from Pakistan's ports to military bases in Afghanistan has been repeatedly attacked in the last year.

VOA: standard.2009.03.15

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

He says Germany is behaving as a loyal ally because it has not objected to the US using its military bases in the country, and has mounted extra guards to protect those bases as the Iraq crisis has built up.

BBC: Analysis: Schroeder challenges the US

The company provides engineering services to offload the complexity of maintaining multiple code bases which has proven to be a common issue for smartphone manufacturers, freeing the manufacturer to focus on hardware design and integration.

ENGADGET: Canonical announces Ubuntu for smartphones, we go hands-on (video)

As well as Welshpool, it has bases at Swansea and at Caernarfon, Gwynedd.

BBC: Wales air ambulance trials night rescues