Underdrainage
n. 暗渠排水, 地下排水
🗣️ 情景例句
Before a long trip I always give my car a safety check.
远行之前，我总是会对车子进行安全检查。
He hasn't done any worthwhile work in five years.
这五年来他没做过一件正经事。
She runs everyday in order to lose weight.
她每天都跑步是为了减肥。