名词
中文翻译：Unknown
同义词：
['rock', 'rocky', 'stone', 'stratum']
例句：
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1. The ancient city is located in a rocky area.
这个古老的城市位于一个岩石区域。
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2. The geologist studied the rocky layers of the mountain.
地质学家研究了这座山的岩石层。
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3. The stone wall was made from the local rocky material.
这堵石墙是用当地的岩石材料制成的。