The foundation for an earth-fill dam would be the natural soil or rock on which the dam is placed.Concrete footings or piles and pile caps are often referred to as foundations without including the soil or rock on which or in which they are placed.是什么意思_The foundation for an earth-fill dam would be the natural soil or rock on which the dam is placed.Concrete footings or piles and pile caps are often referred to as foundations without including the soil or rock on which or in which they are placed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句