水生环境下的藓类植物，细胞胞壁薄，表皮细胞排列不紧密，茎皮部无内外皮部分化。
Compared with xeric and shady mosses, the aquatic mosses had thin cell walls, the loosely arrayed epidermis cells, and no differentiation of cortex.
而且光纤非由绝缘体资料造败，出无会呈现同轴电缆果外皮带电引行辐射招致波形得实的题纲。
And optical fiber is made of insulating material, will not arise the problem of waveform distortion caused by the radiation of the charged cable sheath.
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