步骤一：把油梨剖开，从中间取出核。
Step One: Open the avocado and remove the pit from the center.
核膜实际上由两层平行的单位膜构成，膜中间为核间隙。
The nuclear envelope is actually two parallel unit membranes with an intervening perinuclear space.
中间纤维支撑并加固核被膜。
Figure Intermediate filaments support and strengthen the nuclear envelope.
中间纤维支撑并加固核被膜。
Figure Intermediate filaments support and strengthen the nuclear envelope.
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