Underclay
n. (煤层下的)底黏土层
🗣️ 情景例句
Fifteen minutes! Thank you. Good-bye.
十五分钟 ！谢谢 。再见。
The (or A) beggar may sing before the thief (or footbad).
既是穷光蛋，何虑窃贼偷。
I asked him what it was and he told me that it was Medusa, the Gorgon.
我问他那是什么？他告诉我那是蛇发女怪美杜莎。