ambulacral

adj.pertaining to the ambulacra of radial echinoderms

1. The ambulacral grooves of the sea star are lined with tube feet, which help it move along the ocean floor.
   海星的足沟上布满了管足，帮助它在海底移动。
2. The structure of the ambulacral system is crucial for the survival of echinoderms.
   足沟系统的结构对于棘皮动物的生存至关重要。