Regolith
n. （=mantlerock）[地质]风化层, 土被
🗣️ 情景例句
This has been a hard course for me.
这门课对于我来说很难。
Does this bus go to the train station?
这辆公共汽车去火车站吗？
You are walking too fast. I can't keep up with you.
你走得太快，我跟不上。