ambulacral radial canal

例句：

1. 1.The ambulacral appendages are the legs of the crab.
   螃蟹的节肢是腿。
2. 2.The ambulacral appendages are the legs of the crab.
   螃蟹的节肢是腿。
3. 3. The ambulacral appendages are the legs of the crab.
   螃蟹的节肢是腿。