Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
But his teeth hurt, and he just can't get to sleep, poor dear.
但他的牙疼， 他不能入睡， 可怜的小宝贝。
The blouse no longer fits me.
这件衬衣不再合我身了。
Of course, Father Christmas isn't real.
当然，圣诞老人并不是真的。