以下为句子列表：
英文: The ultrastructure of the blepharoplast and the multilayered structure (MLS) in the fern Osmunda cinnamomea var. asiatica Fernald have been studied by electron microscopy with respect to spermatogenesis.
中文: 应用电镜技术对蕨类植物分株紫萁(Osmunda cinnamomea L.var.asiatica Fernald)精子发育过程中的生毛体和多层结构的超微结构进行了研究。
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