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1·Specifically, lignin is a highly polymerized, amorphous material that makes up the middle lamella of woody fibers and cements the fibers together.

木质素是一种高度聚合的无定形材料，组成木质纤维的胞间薄层将纤维连接起来。

2·Pectin, the major component in the middle lamella and primary cell wall of higher plants, has a great impact on the viscosity and turbidity of fruit juices.

果胶普遍存在于各种水果中，是水果细胞中层和初生壁的主要成分，果汁中的果胶对其粘度和浊度有较大影响。

3·In both woods, chlorine reacted very rapidly with lignin but the extent of reaction was greater in the secondary wall than in the cell corner middle lamella.

无论是云杉或是桦木，细胞角处的胞间层或次生壁的木素都极易和氯反应。

4·Under soil drought stress lamella structure of chloroplast wrenched obviously and there was a black area, which had high electron density in the middle of chloroplast.

在土壤干旱胁迫下，叶绿体的片层结构发生严重的扭曲并在中央部分形成电子密度较高的黑色团块物质。