The nuclear envelope is actually two parallel unit membranes with an intervening perinuclear space.

核膜实际上由两层平行的单位膜构成，膜中间为核间隙。

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The nuclear envelope is actually two parallel unit membranes with an intervening perinuclear space.

核膜实际上由两层平行的单位膜构成，膜中间为核间隙。

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