They prevented the flood from breaking over the dam.

他们堵住了洪水,不让它淹过堤坝.

《简明英汉词典》

We should take measures to prevent the flood from threatening that area.

我们应该采取措施防止洪水威胁那个地区.

互联网

We must build banks to prevent the flood from flowing downward.

必须修筑围堤,坚决防止污水下泄.

互联网