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- 气垫船先在水面之上行驶，然后登上河滩，爬上沙丘，而后停在路上。
The hovercraft travelled first over the water, then mounted the beach, climbed up the dunes, and sat down on a road.
- 小船在沙丘搁浅，没过多久我们就又使它航行自如了。
The boat stuck on a sandbank but we soon got it afloat again.
- 沙漠里有许多沙丘。
There are lots of dunes in the desert.
- 这个小沙丘是由风吹来的干沙子形成的。
The little dune is formed with loose dry sand by wind.
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