Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
Hi, Pop. Hi, Son.
你好， 爸。你好 ，儿子。
That sounds good. Let's get something at the hotel restaurant. I feel a little tired.
那太棒了，我们就到旅馆餐厅吃点东西，我有点累了。
What is the price difference?
价钱差多少？