这个沙丘不结实，像他脚下的流沙一样。

The sandbank was uncertain, like quicksand under his feet.

《柯林斯英汉双解大词典》

面对荒芜起伏的撒哈拉沙丘、无边无际的了无人烟的海滩以及满街的漂流沙砾，游客基本上不知所措。

For desolate, undulating Saharan sand dunes, endless unpeopled beaches and sand-drifted streets, you can't do better.

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实际上，大克雷特龙能使自己潜入流沙之中，利用十条有力的腿在沙丘中穿梭。

The greater dragon actually submerges itself in the shifting sands, and can use its ten powerful limbs to swim through the dunes.

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