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1·Before long, she had traveled half a mile into the barren labyrinth between the hills of sand.

不久她就行进了半英里来到沙丘间的荒凉的迷宫中。

2·The sand-bramble is a kind of bush with great vitality and it often grows in the dry and cold barren mountain areas.

沙棘是一种生命力极强的灌木，一般生长在干燥、寒冷的贫瘠山区。