If the planet is on the cooler edge of the habitable zone, it could go through cycles of freezing and thawing.
如果行星处于可居住区的更冷(外)端，它或许会进入冰冻和解冻周期。
2
The high absorption energy makes ground water in air containing zone move towards the freezing layer and produce seasonal frozen perched ground water.
它具有很强的吸附能凝聚水分，使包气带水和潜水从液态、汽态向冻结层迁移富集，形成季节性固态地下水。
3
Based upon the shield construction practice in the portal section of South Tube of Yanan Donglu Tunnel, this paper demonstrates the technology for slurry balance shield passing through freezingzone.