The term 'synusia 'was defined so broadly that confusion in use of the concept resulted.
“层片”一词的定义过于广泛，以致在层片概念的应用中引起混乱。
Layer structure, synusia structure and height - classes structure and dynamics of degraded ecosystem were studied.
对退化生态系统的层次结构、层片结构、高度级结构及其动态等进行了研究。
The results showed that the more serious the community degraded, the simpler the layers, the synusia and the height- classes structures in community were.
结果表明：群落的退化程度越严重，群落的层次、层片和高度级结构越简单；
The results showed that the more serious the community degraded, the simpler the layers, the synusia and the height- classes structures in community were.
结果表明：群落的退化程度越严重，群落的层次、层片和高度级结构越简单；
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