sill|sills

我们坐在窗台的石沿上欣赏风景。

We sat on the stone ___sill to enjoy the view.

窗台上积了一层薄薄的灰尘，需要打扫了。

There is a thin layer of dust on the ___sills that needs to be cleaned.

猫咪喜欢坐在窗台上晒太阳。

The cat enjoys sitting on the ___sill to bask in the sun.