One day a man and a little girl were walking on the rocks at water's edge.

有一天，一个男人和一个小女孩在水边的岩石上行走。

youdao

I sat down at the water's edge.

我在水边坐了下来。

《牛津词典》

She was standing at the water's edge.

她正站在水边。

《柯林斯英汉双解大词典》

They enjoy sailing and fishing, water skiing,swimming, or just sitting at the water's edge, daydreaming.

VOA: special.2010.08.30

"We think that virtually 99% of the people who live at the water's edge will want to continue to do that, " said Mayor Michael Bloomberg, at a recent news conference.

WSJ: Reshaping Shore Homes

No matter where it starts, an economic crisis does not stop at the water's edge.

BBC: In full: Brown's speech to Congress

At the water's edge I meet an American woman in a wide-brimmed hat, searching for tiny wild orchids.

BBC: Swiss movement