Underclay
n. (煤层下的)底黏土层
🗣️ 情景例句
First, they have an excellent School of Journalism.
首先 ，那儿有个很优秀的新闻研究所。
You are smaller than I am.
你比我小。
First, I tell the actors where to stand and where to move.
首先，我要告诉演员在剧中站立和移动的位置。