Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
There we go ... will make twenty. Thanks.
你看……加起来正好二十美元。谢谢了。
Whom will you invite to the picnic?
你将邀请谁参加野餐？
At the moment, they cover every inch of floor space and I actually have to walk on them to get in or out of the room.
这会儿，书把地板的每一点空隙都占据了，我实际上是踩着这些书进出房间的。