In this paper coherent excitation of two-photon resonance in three-level systems is discussed.

本文研究了双光子共振相干激发三能级系统的问题。

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Integration of decision support and policy level systems with economic event processing systems.

决策支持和政策制定系统与经济事件处理系统整合。

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Two-level systems under the action of a laser pulse train are studied by rotating-wave approximation.

本文采取旋波近似，分析了序列脉冲激光作用下的双能级系统。

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But in fact academic studies have shown that this is wrong-footed and that in the long run by not having a level playing field, by not building systems, by not creating competitive markets you are actually undermining development and you are undermining economic growth and you are taking away the trust of potential investors."

VOA: standard.2009.11.17

Even if quantum mechanics was wrong and somehow, you know, at the macro level all the indeterminism boils out-- whatever-- and at the macro level we are deterministic systems, so what?

即便量子力学是错的,而且不知怎的,在宏观水平上,所有的非决定性都蒸发了,不管发生了什么,在宏观水平上我们都成了决定论的系统,那又如何

耶鲁公开课 - 死亡课程节选

If you go on to study more about immunology, which I know most of you will, you will recognize that I'm-- this is just the simplest level of one of the most complex systems within our body.

当你们更加深入了解免疫学时,我知道大多数人会的,你们将会意识到,我现在只是对免疫系统,这一人体内最复杂的系统做最基础的介绍

耶鲁公开课 - 生物医学工程探索课程节选

The 13 top-level systems are actually in different countries, are looked after by different organisations and run on different technologies.

BBC: Viewpoint: How hackers could decapitate the internet

This highly integrated system-on-chip enables a cost-effective design for mid- to high-level infotainment systems and can scale to add the functionality of an external applications processor.

ENGADGET: TI to be driving force behind Audi's next-gen MIB High infotainment platform

COSAC-Plus has since taken Hactl to a new level of systems sophistication, with enhanced functions and features that set new industry standards and brings major benefits to our customers.

FORBES: The Decade of the CIO is Here - The Beyond CIO Series