There are different types of pit-pair between the axial tracheids. the axial tracheid and the ray parenchyma, the axial tracheid and the ray tracheid.

轴向管胞之间、轴向管胞与射线薄壁细胞之间、轴向管胞与射线管胞之间，均有不同类型的纹孔对。

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There are different types of pit-pair between the axial tracheids. the axial tracheid and the ray parenchyma , the axial tracheid and the ray tracheid.

轴向管胞之间、轴向管胞与射线薄壁细胞之间、轴向管胞与射线管胞之间，均有不同类型的纹孔对。

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For this pair of concerned countries, it is an open pit really.

这对有关国家来说，真是一个公开的陷阱。

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The flashiest new models, however, are a pair of thin, light models that will pit Dell against Apple 's (nasdaq: AAPL - news - people ) and Sony 's (nyse: SNE - news - people ) efforts to couple style and portability into ever sleeker shapes.

FORBES: Dell's Laptop Strategy