以下为句子列表：
英文: At the end of February, the bract attained approximately their full size, and a pair of anatropous ovules were initiated on the adaxial surface at the base of the fertile ovuliferous scale.
中文: 2月底，苞片体积不再发生变化，珠鳞膨大端的基部的近轴面分化出2个倒生胚珠。
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英文: Leaves thick leathery, obovate-lanceolate, obovate or oblong-lanceolate, 4-12 cm long and 2-3.5 cm wide, apex rounded, sometimes emarginated, base cuneate, abaxial surface thinly covered with a grayish to fawn indumentum at first, later glabrescent; petio
中文: 叶厚革质，倒卵状披针形、倒卵形或长圆状披针形，长4-12厘米，宽2-3.5厘米，顶端近圆形，有时微缺，基部楔形，下面初时薄被灰白色或淡土黄色丛卷毛，后近无毛；叶柄长1-1.5厘米，后近无毛。
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英文: Leaves from the forth to sixth nodes of 'He Lan Bai' plants in vitro were cut into leaf discs about 0.cm, inoculated with the adaxial surface on regeneration medium (MS + NAA 0. mg/L + -BA .0 mg/L), six weeks later the regeneration rate reached 9 .%.
中文: 将‘荷兰白’试管苗的第～片叶片剪成0.cm~左右的叶盘,近轴面接触培养基接种在MS+NAA0.mg/L+-BA.0mg/L的培养基上,经过w的培养其再生率可达9 .%。
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英文: The sori are borne on the abaxial surface of the pinnule, arranged in two rows parallel to the midvein, elliptic,and composed of -0 round sporangia.
中文: 囊群椭圆形 ,由 ～ 0个孢子囊组成 ,着生于小羽片背面 ,位于中脉的两侧 ;
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