以下为句子列表：
英文: Annular thickening Rings of thickening laid down on the inner wall of protoxylem vessels and tracheids.
中文: 环状加厚：原生木质部导管和管胞的内层环状増厚。
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英文: Fiber-tracheid An elongated cell with bordered pits found in wood, intermediate in form between a fiber and a tracheid.
中文: 纤维管胞：木材中具有具缘纹孔的细长细胞，是纤维和管胞的中间类型。
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英文: These genera and Ephedra also hve advanced tracheids with a structure reminiscent of angiosperm vessels, whereas in other gymnosperms the xylem is composed solely of more primitive tracheids.
中文: 这些属以及麻黄属植物和被子植物一样有进化的管胞，而其他的裸子植物的木质部只由很多导管组成。
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英文: Tranfusion tissue is present in the leaf of yew. It is composed of three sorts of cells: transfusion tracheids, transfusion parenchyma cells, and albuminous cells.
中文: 在红豆杉的叶子中存在传输组织，它由传输细胞、传输薄壁组织细胞和蛋白细胞组成。
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英文: Where they occur interspersed with the xylem they may be distinguished from tracheids by their narrower lumen.
中文: 纤维分布与木质部相似，其狭窄的腔可与管胞区分开来。
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