These steps include specific cutting of DNA at defined sites, joining or splicing of DNA fragments, and numerous other modifications which allow manipulation down to the level of a single base pair.是什么意思_These steps include specific cutting of DNA at defined sites, joining or splicing of DNA fragments, and numerous other modifications which allow manipulation down to the level of a single base pair.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句