常見例句雙語例句Three-dimensional diagram illustrating a river meander with a point bar being formed on one bank and erosion occurring on the other bank .對某河曲進(jìn)行說明的三維示意圖，河的一岸正在形成曲流沙壩，另一岸正在受到浸蝕。 返回 river-bank erosion