Underdrainage
n. 暗渠排水, 地下排水
🗣️ 情景例句
What do you think of China?
你认为中国怎么样？
My native language is Chinese.
我的母语是汉语。
To varying degrees, we all have secrets which we do not want even our closest friends to learn,
尽管我们人人都有各种大小秘密。连最亲密的朋友都不愿让他们知道，