Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
to ask Dad to sign as a guarantor.
请爸爸当担保人为我签字。
I'm sure I've forgotten something ,but it's too late now.
我肯定我忘记了一些东西，但是它现在是太迟了的。
I can let you have this kind cheaper.
我可以算你便宜一点。