从目前已有的记录来看，60 %以上的单殖吸虫只有1种宿主，约75%的单殖吸虫的宿主仅为1属，超过97%的单殖吸虫的宿主在1科之内。

According to published records, more than 60% species of monogeneans were found only on 1 host species, and about 75% species on 1 host genus, over 97% species on 1 host family.

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宝铎草，桔梗科植物一种多年生百合科颚花属植物，原产于北美洲东部，开有单生的、摆动的黄色钟状花。

Any of various perennial plants of the genus Uvularia in the lily family, native to eastern North America and having solitary, nodding, yellow bell-shaped flowers.

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口蹄疫病毒是小RNA病毒科口蹄疫病毒属的唯一成员，不含囊膜的病毒粒子包含有一个单链正股RNA基因组。

FMDV is a member of the picornavirus family. Non-enveloped FMDV has a single stranded positive-sense RNA genome.

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