database operation types. Good code, very hard obtained.
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very hard obtained
很难获得
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Most of the requirements are obtained by encrypting the documents stored in the cloud, but encryption makes it very hard to search through such documents or to collaborate in real time editing.
大多数需求都是通过对存储在云中的文档进行加密才解决的，但是加密使得在这些文档中进行搜索，或者在实时编辑的时候进行协作变得很困难。
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