Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
What number do I dial?
我应该拨哪个号码呢？
I'm afraid not. She doesn't have any openings in the morning.
恐怕不行。上午她没有空。
I don't know what you're talking about.
我不知道您在说些什么。