echiuroid

例句：

1. 1. Echiurids are a group of marine animals that live in the oceans.
   海马科是一群生活在海洋中的动物。
2. 2. The echiurid, known as the seahorse, is a fascinating creature.
   被称为海马的海马鱼是一种令人着迷的生物。
3. 3. Echiurids have been used in traditional medicine for their supposed healing properties.
   海马在传统医学中被用作具有潜在治疗功效的物质。