To understand RNAi and RNA in general, researchers began isolating and studying RNA molecules just 21 to 30 bases long.

为了在总体上了解RNA干扰和RNA，研究人员开始分离并研究只有21到30个碱基长的RNA。

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This technique, although it has been used successfully in isolating a number of important genes (2, 3), is rather difficult to establish, irreproducible, and requires large amounts of RNA.

这项技术，虽然它已成功地在一些孤立的重要的基因(2,3)，是比较难建立，复制的，需要大量的RNA。

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Objective To establish a rapid method for isolating and purifying cancer cells from tumor tissue and for RNA extraction from tiny amount of the cells thus obtained.

目的建立一种快速分离、纯化肿瘤组织癌细胞并提取微量rna的方法。

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Objective To establish a rapid method for isolating and purifying cancer cells from tumor tissue and for RNA extraction from tiny amount of the cells thus obtained.

目的建立一种快速分离、纯化肿瘤组织癌细胞并提取微量rna的方法。

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