culvert [ˈkʌlvət]

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附加级

n. 暗渠, 阴沟, 电线用地下电管路

After days of hard work, the culvert was at last completed. 经过几天的苦战，高低把涵洞修好了。
They ran for the culvert and ducked in. 他们跑到涵洞跟前，钻了过去。