A covalently linked chain of deoxribonu- cleotides. The double helix is composed of two DNA strands.

脱氧核糖核苷酸以共价键连接起来的链。双螺旋由两条DNA链组成。

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A covalently linked chain of deoxribonu- cleotides. The double helix is composed of two DNA strands.

脱氧核糖核苷酸以共价键连接起来的链。双螺旋由两条DNA链组成。

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