Underclay
n. (煤层下的)底黏土层
🗣️ 情景例句
No doubt about it.
毫无疑问。
No regrets.
无怨无悔。
He calls at every house in the street once a month and always asks for a meal and a glass of beer.
他每月对这条街上的每户人家光顾一次，总是请求给他一顿饭和一杯啤酒。