amphibian undercarriage

例句：

1. 1. The amphibians swam across the river to reach the other side.
   这些两栖动物游过河去到达另一边。
2. 2. The amphibians are known for their ability to survive in both land and water environments.
   这些两栖动物因其在陆地和水环境中的生存能力而闻名。
3. 3. Amphibians play a crucial role in maintaining the balance of ecosystems.
   两栖动物在维持生态系统平衡中起着关键作用。