Technicians extract DNA from a sputum specimen and then use amplifying techniques to produce large Numbers of copies of the DNA.

技术人员从唾液样本中提取DNA，然后采用扩增技术产生大量的DNA拷贝。

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To solve these problems, we should standardize the DNA techniques, control the quality, set up a complete DNA database, and move the DNA analyze technique in China to a new era.

为解决STR在我国存在的问题，应尽快完善DNA技术标准化、质量控制化。建立完善的DNA数据库，使我国DNA分析技术进入一个崭新的时代。

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They were one of the first animal research projects to use DNA finger-printing techniques in wild animals so as to understand the relationships within a pride.

BBC: Lions breed better if living near joining rivers