flood plain
柯林斯词典
1. N-COUNT A flood plain is a flat area on the edge of a river, where the ground consists of soil, sand, and rock left by the river when it floods. 河漫灘
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1. N-COUNT A flood plain is a flat area on the edge of a river, where the ground consists of soil, sand, and rock left by the river when it floods. 河漫灘