Regolith
n. （=mantlerock）[地质]风化层, 土被
🗣️ 情景例句
The pleasure is mine.
认识你是我的荣幸。
Sadness and gladness succeed each other.
悲喜互继，哀乐相续。
But the competition of man against man is not the simple process envisioned in biology.
但是，人与人的竞争并不像生物学中想像的那样是一个简单过程。