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所有生物的每个细胞内部都存在DNA分子链。
Inside every cell in all organisms, there are strands of DNA.
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研究表明，剔除必须在细胞内部进行。
The study showed deletion must take place inside the cells.
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研究表明，剔除必须在细胞内部进行。
The study showed deletion must take place inside the cells.
youdao