英语翻译isolation procedures are usually followed by the appllcation of certaina criteria of purity to the compound isolated.
问题描述：
英语翻译
isolation procedures are usually followed by the appllcation of certaina criteria of purity to the compound isolated.
答
Isolation procedures are usually followed by the (application) of (certain) criteria of purity to the compound isolated.
（化学上的——译者添）分离过程往往指对待分离化合物采用某种标准予以（或：进行）提纯.
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