名词
中文翻译：卵形涵洞
同义词：
['oval tunnel', 'oval pipe']
例句：
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1. Theengineer designed the oval culvertto divert the water away from thefloodplain.
工程师设计了卵形涵洞，将水引离洪水区。
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2.The construction of the oval culvert was completed ahead of schedule.
卵形涵洞的建设提前完成。
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3. Theoval culvertis essential for maintaining the stabilityof the riverbed.
卵形涵洞对于保持河床的稳定性至关重要。