otter|otters

我们看到一只水獭在河边的岩石上晒太阳。

We saw an ___otter basking on the rocks by the river.

我们在湖边看到一群水獭从泥泞的斜坡上滑下来。

We saw a group of ___otters sliding down a muddy slope by the lake.

这件复古外套的领子是用海獭皮制作的。

The collar of this vintage coat is made from ___otter.