trematode worm英美[网络] 蠕虫虫网络双语例句Tadpole-shaped parasitic larva of a trematode worm; tail disappears in adult stage.烃源岩已进入成熟阶段,处于生油高峰期。蝌蚪形的吸虫类寄生幼虫;成体阶段尾巴消失。