在同一宿主内同时存在两种以上原寄生者（pri－mary parasite）的现象就称为多寄生。该词主要用于捕食寄生者。
结论：鼠类体外各寄生虫群落物种丰富度和多度随宿主动物种类不同而变化较大。
Conclusion: Species richness and abundance indices varied significantly in different types of ectoparasite communities among different hosts.
多斑艾美球虫主要寄生于空肠、回肠、盲肠和直肠绒毛中部到顶部的上皮细胞中，引起轻微病变。
E. stigmosa parasitized mainly in the epithelial cells of jejunum, ileum, ceca, and rectum from middles to tops of villi, and resulted in mild histopathological changes.
为了隔离后向反射激光以及激光器多程放大系统中的寄生振荡，需要研制一种大口径的电光开关。
To isolate the retroreflections from the target and the self-oscillation in multipass amplifier system, the large-aperture electro-optical switch is required.
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