Regolith
n. （=mantlerock）[地质]风化层, 土被
🗣️ 情景例句
Financial security, that's what it's all about.
家庭财政状况无忧，这就够了。
They used to live there, didn't they?
他们过去住在哪里，不是吗？
Thanks very much. Bye.
太谢谢你了。再见。