guǎn / yuán / xiàn / chóng / shì / yì / zhǒng / huì / jì / shēng / zài / dòng / wù / tǐ / nèi / de / jì / shēng / chóng管圆线虫是一种会寄生在动物体内的寄生虫。The eel worm is a parasite that can live inside animals.