ascidium

例句：

1. 1.The ascidium is a rare species of sea snail.
   海蛞蝓是一种罕见的海洋蜗牛。
2. 2. The ascidium was found in the deep ocean.
   海蛞蝓被发现在深海中。
3. 3. The ascidium has a unique ability to regenerate its body parts.
   海蛞蝓具有独特的再生身体部位的能力。