picotah

例句：

1. 1. The beavers are busy building their dams in the river.
   河狸们在忙着建造它们的水坝。
2. 2. The beavers are known for their ability to dig and create tunnels.
   河狸以其挖掘和创造隧道的能力而闻名。
3. 3. The beavers play an important role in maintaining the health of the ecosystem.
   河狸在维护生态系统健康方面起着重要的作用。