Underdrainage
n. 暗渠排水, 地下排水
🗣️ 情景例句
I'm glad our negotiation has come to a successful conclusion.
我很高兴这次洽谈圆满成功。
There may be some quantity difference when loading the goods, but not more than 5%.
货物装船时可能会有一些数量出入，但不会超过5%。
You are kidding.
你开玩笑吧。