名词
中文翻译：Unknown
同义词：
['subside', 'subsoil', 'subsurface']
例句：
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1. The geologists were able to infra dig the ancient city ruins.
地质学家能够挖掘出古代城市遗迹。
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2. The scientists conducted an infra dig to study the underground water flow.
科学家们进行了一次地下钻探以研究地下水流动。
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3. The engineers had to infra dig a tunnel through the mountain to reach the other side.
工程师们不得不在山中钻一个隧道以便到达另一边。