没有受精的中央细胞退化时最显著的特点是细胞核产生核膜囊泡。
The most prominent sign of degeneration is that the central cell nucleus produced nuclear vacuoles.
它们大都存在于细胞核膜的内外层之间，有时也散布于细胞核及细胞质内。
Many of the particles were arranged between the inner and outer membranes of the nucleus, and many were distributed in both the cytoplasm and nucleus.
细胞核的核膜上有独特的具有识别能力的核孔。
The nucleus is uniquely recognizable by the system of pores embedded within its outer membrane.
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