3,087 个单词和短语 · 21 个主题

词汇

permafrost

n.L2 进阶C1

多年冻土

英文释义 ground, such as soil or rock, that remains at or below zero degrees Celsius for at least two consecutive years

在休闲、新排位或单人练习中遇到这个词并作答，就能解锁完整词条。