infections of the skin or nails caused by fungi and appearing as itching circular patches
unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic
例句
用作名词(n.)
Roundworm is a worldwide distribution of human parasites, the infection is widespread in China, especially in rural areas.蛔虫是世界性分布的人体寄生虫，在我国感染很普遍，特别是在农村。
