Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
I need to take a break from studying. Let's get drunk.
我不学习了，得休息一会儿。咱们一醉方休吧。
All men are mortal.
人孰无死。
How long has Jim been at his school?
吉姆到校有多长时间了？