Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
Hello, Alexandra.
哈喽， Alexandra。
An evening red and a morning grey, is a sign of a fair day.
晚霞红如火，晓色青如灰，定是晴朗天。
I didn't mean to offend you.
我不是故意冒犯你。