以下为句子列表：
英文: Observation by paraffin section showed that Lipeng No.2 embryo sac mother cells were almost entirely degenerated during megasporogenesis.
中文: 切片观察发现，丽椪2号胚囊母细胞在四核期已完全退化。
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英文: Medicus was done with the paraffin section method.
中文: Medicus]的叶片进行形态解剖学研究。
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