alluvial cone sand trap

例句：

1. 1. Thealluvial cone sand trap is a unique geological feature that occurs in river valleys.
   冲积锥形沙丘陷阱是一种独特的地质特征，出现在河流谷地中。
2. 2. The alluvial cone sand trap is formed by the accumulation of sediment in the riverbed.
   冲积锥形沙丘陷阱是由河床中的沉积物积累形成的。
3. 3.The alluvial cone sand trap is an important indicator of climate change and environmental degradation.
   冲积锥形沙丘陷阱是气候变化和环境退化的重要指示器。