According to the difficulties arising in long term preservation of digital information, this paper proposes the tactical orientation for it.

针对数字信息长期保存所面临的难题，提出数字信息长期保存的策略。

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These results indicate that bovine follicular oocytes can be frozen for long term preservation in liquid nitrogen and mature in vitro after thawing.

研究结果证明，牛卵巢卵母细胞可作超低温冷冻长期保存，解冻后可以体外培养成熟。

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Records identified for continuing retention need to be stored in environments conducive to their long-term preservation.

已被识别须持续保存的档案，应该被存放在一个能促进档案长期保存的环境中。

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Towards that goal, OSTP last week released two Requests for Information (RFI) soliciting public input on long term preservation of and public access to the results of federally funded research, including digital data and peer-reviewed scholarly publications.

WHITEHOUSE: Request for Information on Public Access to Digital Data and Scientific Publications | The White House

Speaking of her responsibilities as Vice-Chairman of the Board of Trustees of the Royal National Museum, Princess Sumaya raised the need to develop a regulatory framework that would enhance the overall responsibility of national museums in the long term preservation and management of national cultural heritage landmarks, stressing the moral obligation each national museum holds with respect to its national heritage.

UNESCO: The Director-General met with HRH Princess Sumaya bint El Hassan | United Nations Educational, Scientific and Cultural Organization

In making its recommendation, the Jury took the following factors into consideration: the significance of work already undertaken in the area of preservation that is beyond the candidate's regular functions, long-term preservation strategy, sustainability, and international outreach.

UNESCO: MEDIA SERVICES