暴雨来临前，村民们在堤坝旁堆起土牛，预防洪水冲垮堤防。
Before the torrential rain arrived, the villagers piled up a mound of earth beside the dam to prevent the flood from washing it away.
Before the torrential rain arrived, the villagers piled up a mound of earth beside the dam to prevent the flood from washing it away.