名词
中文翻译：堤防底部
同义词：
['bottom of a dam', 'bottom of a dam wall', 'dam bottom']
例句：
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1.The engineers were working on the bottomof the dam to repair it.
工程师们正在大坝底部工作，以修复它。
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2. The workers had to dig deep intothe bottom of the river to find thelost treasure.
工人们不得不深入河流底部寻找失落的宝藏。
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3. The scientists conducted experiments onthe bottom of the ocean to study marinelife.
科学家们在海洋底部进行实验，以研究海洋生物。