冻土层 Traditional 凍土層 dòng tǔ céng 🔊 permafrost + Review this word Meanings dòng tǔ céng 凍土層 permafrosttundralayer of frozen soil Its characters 冻dòngto freezeHSK 5土tǔearthHSK 4层céngto pile on top of one anotherHSK 3