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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While you may have a new set of colleagues, preserving relationships with old co-workers and managers is important, particularly in such a volatile work environment.

虽然你有了一群新同事，但与旧同事和旧上司保持联系十分重要，特别是在这种易变的工作环境中。

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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