名词
中文翻译：重粘土
同义词：
['heavy silt', 'heavy mud']
例句：
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1. The heavy clay made it difficult todig a hole.
重粘土使得挖洞变得困难。
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2. Heavy clay isprone to compaction, which can makeit difficult to work with.
重粘土容易压实，这使它难以使用。
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3. Theheavy clay was used in the construction ofthe ancient city walls.
重粘土被用于古代城墙的建设。