Underclay
n. (煤层下的)底黏土层
🗣️ 情景例句
I'd like to propose a toast.
我想来祝酒。
Never (or Don't) trouble trouble till trouble troulbes you.
切莫自寻麻烦。
The porter went to fetch one and arrive back with the station master,
搬运工跑回去取时刻表，同时请来了站长。