sand dune

1.Dragging the fully laden boat across the sand dunes was no mean feat.

将满载货物的船拖过沙丘是一件起的事。

2.Dipus sagitta showed a high density and was dominant in desert-type habitats, especially in sand dune.

聚类分析结果显示, 研区啮齿动物落可以分成荒落和绿洲落两大类。