Solutions to some problems existed in quasi-accelerated life tests for long-life spacecraft mechanisms were put forward.

针对目前长寿命航天器机构准加速寿命试验中存在的问题，提出了解决这些问题的思路。

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The article describes the application forms and effects of nano-material in aqueous coatings and discusses some problems existed at present.

本文简要介绍了纳米材料在水性涂料中的应用形式和效果，并对目前存在的一些问题进行了探讨。

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Aiming at some problems existed in the traditional region-based image fusion methods, a novel compound region segmentation image fusion method is proposed.

本文针对传统基于区域分割的图像融合算法存在的一些问题，提出了复合式区域分割的图像融合策略。

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Domestically, we still have a lot more to do to heal this economy and to deal with some of the structural problems that existed even before the financial crisis hit.

WHITEHOUSE: The White House

We will continue to have him focus on the economy and jobs, continue to focus on dealing with the problems that he felt and talked about during the campaign that existed and have existed for quite some time that we haven't addressed.

WHITEHOUSE: Press Briefing