名词
中文翻译：Unknown
同义词：
['conglomerate', 'conglomerate clay']
例句：
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1. The boulder-clay has been used to create beautiful sculptures.
这种砾石黏土被用来创作美丽的雕塑。
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2. The boulder-clay was found in the riverbed during the construction of a new bridge.
在建造新桥的过程中，在河床上发现了砾石黏土。
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3. The boulder-clay is a valuable resource for archaeologists who study ancient civilizations.
对于研究古代文明的考古学家来说，砾石黏土是一种宝贵的资源。