valley shape factor

例句：

1. 1. The valleyshape factor is a measure of the curvature of the terrain in a valley.
   山谷形状因子是衡量山谷地形曲率的指标。
2. 2. The valley shape factor has been shown to be an important factor influencing the stability of rivers and streams.
   山谷形状因子已被证明是影响河流和溪流稳定性的重要因素。
3. 3. The valley shape factor was used by geologists to predict the location of ancient volcanoes.
   山谷形状因子被地质学家用来预测古代火山的位置。