通过多角体超薄切片的横切面观察，囊膜内包被的核衣壳数变动于1～10之间，只包被1个核衣壳的数目最多，约占总数的80.04％，病毒束在排列图式上存在差异。

Numbers of nucleocapsids observed in an envelope in their cross sections ranged from 1 to 10, and the frequencies at 1 nucleocapsid was significantly higher than the others, almost 80.04% of the all.

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