amphicoelian

例句：

1. 1.The amphicoelian worm is a fascinating creature that swims both ways.
   这种两栖动物令人着迷，既能游泳又能爬行。
2. 2. The amphicoelian worm is a fascinating creature that swims both ways.
   这种两栖动物令人着迷，既能游泳又能爬行。
3. 3.The amphicoelian worm is a fascinating creature that swims both ways.
   这种两栖动物令人着迷，既能游泳又能爬行。