名词
中文翻译：软土层
同义词：
['soft soil', 'soft earthy soil例句：1. The construction of the new highway will require the excavation of soft sub-soil.（新高速公路的建设将需要挖掘软土层。）']
例句：
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1. The construction of the new highway will require the excavation of soft sub-soil.
新高速公路的建设将需要挖掘软土层。
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2.The farmer carefully dug down into the soft sub-soil to find the source of the water.
农民小心地挖到软土层，以找到水源的源头。
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3. The engineer used a special tool to loosen the hardened soft sub-soil before starting the construction.
工程师使用特殊工具来松动硬化的软土层，以便开始施工。