First the thesis discusses the concepts of forest certification and holds that the forest certification concepts are different for various certification systems.

本文首先讨论了森林认证的概念问题，提出不同体系的森林认证的概念是有区别的。

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Some solutions include re-using existing hardware and software, as well as using modular systems design, rather than complete system re-design and certification, Nicholas says.

其中一些方案包括重新利用现存的硬件和软件以及利用模块系统设计，而不是完全重新设计系统和认证。

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WHO standard verbal autopsy questionnaires are recommended to improve the comparability of causes of death from systems without medical certification of deaths.

建议使用世卫组织的死因推断标准来改善那些没有医学死亡证明的系统的死亡原因的可比性。

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Countless certification systems from around the world help travelers determine which providers are committed to environmental and social sustainability.

CNN: Giving something back

More detailed rating systems and independent certification could help. eLance already gets buyers to evaluate sellers in several categories, such as timeliness and responsiveness.

ECONOMIST: The Internet: At your service | The

The review includes not just the 787's ground-breaking lithium-ion battery system, but how that system works with the aircraft's electronic systems, their certification, manufacture and assembly, he said.

NPR: US Officials Defend Handling Of Boeing 787 Mishaps