纤维细胞壁的超微结构典型地分为胞间层(ML)、初生壁(P)、次生壁外层(S1)、次生壁中层(S2)及次生壁内层(S3)。
TEM images showed that cell wall of the fibre is typically divided into three layers including the primary wall (p), the middle lamellar (ML) and the secondary wall (S1, S2 and S3).
血管中层的肌纤维和外膜的结缔组织，都是从包围原始内皮细胞的间质中发育出来的。
Vessels of the outer membrane and middle muscle tissue, both from the original endothelial cells surround stroma development.
就菌袋中不同料层木质纤维素的降解和利用而言，菌袋的中层和下层与上层相似。
As far as the degradation and the use of the lignocellulose are concerned, the middle and lower layers of the compost are almost the same as the upper layer of the compost.
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