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中文摘要：
以东北蚯蚓常见种赤子爱胜蚓（Eisenia foetida）为实验样本，对其处于收缩、静息和舒张三种状态下的体前部及体中部的体表形貌进行观察拍照和三维扫描，并对其体表接触角进行测量。结果表明收缩态、静息态和舒张态具有不同的非光滑单元密度及表面粗糙度，其接触角也存在显著性差别。收缩态非光滑单元密度和表面粗糙度最大，接触角也最大，即润湿性最差；舒张态非光滑单元密度和表面粗糙度最小，接触角同样最小，即润湿性最好；静息态各参数则处于中间水平。据此，初步建立了蚯蚓体表非光滑单元密度及表面粗糙度与表面润湿性之间的关系，进一步证实了波纹形非光滑结构模型所提出的波形比与润湿性之间的反比关系。
英文摘要：
The surface morphology and contact angle of the fore part and middle part of the earthworm Eisenia foetida, under the contracting, resting, and relaxing state, were respectively observed and tested. The results showed that these three states possessed different non-smooth unit density and surface roughness as well as contact angle. In general, contracting state demonstrated the largest density and roughness, the contact angle of which was the largest, and its wettability as a result was the lowest. While, relaxing state displayed the smallest density and roughness, the contact angle of which was the smallest, and its wettability thus was the highest. As to the resting state, each parameter of it stayed at a middle level. In this work, the correlationship of the non-smooth unit density and surface roughness with the wettability of the earthworm was preliminarily built, and which directly supported the theory that the ratio of the amplitude of the wave to the period of the wave has an inverse ratio of the wettability suggested by the non-smooth model.
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