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
造句
用作名詞(n.)
Roundworm is a worldwide distribution of human parasites, the infection is widespread in China, especially in rural areas. 蛔蟲是世界性分布的人體寄生蟲，在我國感染很普遍，特別是在農村。