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地区。
Planting trees is a way to prevent flood.
植树是预防洪水的一种方法。
The dam backs up the water to prevent flood.
大坝拦住水以防其泛滥。
They are also important because they help prevent flood.
宅们还很重要因为它们能帮助防洪。
They are also important because they help prevent flood.
宅们还很重要因为它们能帮助防洪。
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