Hardpan
n. 硬质地层, 未开垦的硬地, 粘土层
🗣️ 情景例句
I think so.
我想是的。
How long will it take to have this radio fixed?
修理这收音机要多久？
NASA is now going to put the telescope right,
国家航天局准备纠正这一错误，