名词
中文翻译：岩块
同义词：
['rock', 'stone', 'boulder']
例句：
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1.The burro is a small herding dog native to Central America.
土拨鼠是一种原产于中美洲的小牧羊犬。
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2.The burrowing beetle is responsible for the decomposition of organic matter.
穴居甲虫负责有机物质的分解。
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3. The burro was used as a pack animal by early humans.
早期人类使用骆驼作为驮畜。