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
Wouldn't it be a good idea to pick up your room?
你是不是考虑把自己的屋字收拾一下。
A wise head makes a close mouth.
智者寡言。
We're ready! she said. Where is everyone?
“我们都准备好了！”她说，“人都到哪儿去了？”