冻土dòngtǔTop 45000Meanings1. frozen earth2. permafrost3. tundraCharacters used冻to freeze土earthExamples1地球dìqiú表面biǎomiàn的de五分之一wǔfēnzhīyī被bèi冻土dòngtǔ覆盖fùgài了le。One fifth of the earth's surface is covered by permafrost.