Work is under way to develop better ways of preserving such crops.

研发保存此类作物方法的工作正在开展中。

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Dirpersist saves and restores your directory stack across shell invocations, thus preserving important state so that you can resume work where you left off.

Dirpersist跨shell调用存储并恢复目录堆栈，因此可以保留重要的状态，让您能够回到原来离开的位置继续工作。

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For the past 18 years, Jones and others working with Ibiblio have been digitally preserving collections as well as "vernacular work," which are freely accessible works in the public domain.

在过去的18年中，琼斯和其他在Ibiblio上工作的人们已经用数字化的方式将各种文集和“方言作品”保存起来了，后者是那些在公开的域名中可以自由获取的作品。

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As two people who struggled to win our freedom against overwhelming odds, we understand that preserving the security for which our forefathers -- and foremothers -- fought must be the work of every generation.

WHITEHOUSE: President Obama at 2011 AIPAC Policy Conference