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1. The engineer carefully excavated the rockfill groin to remove the debris.
工程师小心翼翼地挖掘岩堆腹部，清除了杂物。
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2.The construction crew was working on the rockfill groin, ensuring it was stable before moving forward.
施工队正在对岩堆腹部进行工作，确保它稳定后再继续前进。
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3.The geologist discovered a new rockfill groin formation in the area, which could hold significant potential for future mining.
地质学家在该地区发现了一个新的岩堆腹部构造，这对未来采矿具有潜在的重大价值。