noun🔗Share永冻土，多年冻土 Permanently frozen ground, or a specific layer thereof."The melting permafrost is releasing methane into the atmosphere, contributing to climate change. "融化的永冻土正在向大气中释放甲烷，加剧了气候变化。geologygeographyenvironmentnatureChat with AIVocabulary GamePractice Reading
