Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
and lay them face down.
将牌盖住。
I often get up in the morning.
我常常在早上起床。
After working hard during the day I like to relax in the evening.
白天干了一天，晚上我要放松一下。