Permafrost
n. [地]永久冻结带
📖 牛津释义
permafrost
n[U]
subsoil that is permanently frozen, eg in polar regions 永冻土, 永冻层（如在极地的）.
🗣️ 情景例句
I love it when people come over to visit.
我喜欢别人来造访。
The concert will be held September 14 at 10 a.m.
该演奏会预定于9月14日10时举行。
Thank you for the beautiful present!
感谢你漂亮的礼物！