Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.
由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。
We don't have winter here, everyday is spring, snow and frozen could only be seen in the mountain and fridge.
我们这里没有冬天，每天都是春天；下雪和冰冻只能在山上和冰箱里才看得到。
If the ground hasn't frozen yet, plant spring-flowering bulbs such as crocus , daffodils, tulips and hyacinths as soon as possible to beat the odds.
如果泥土还未冻结，抓紧时机种下番红花，水仙，郁金香和风信花的球茎。
In my hometown in the north, this was the month when rivers were frozen over and mountains snowbound . But spring comes early to Yunnan, urging the flowers to bloom.
我是北方人，论季节，北方也许正是搅天风雪，水瘦山寒，云南的春天却脚步儿勤，来得快，到处早像催生婆似的正在催动花事。
In Northwest China, the thawing of the frozen layer in spring is the main cause of large-scale landslides in loess region.
中国西北地区春季冻结层的融化，也是大规模黄土滑坡发生的诱因。
Friendship that flows from the heart cannot be frozen by adversity, as the water that flows from the spring cannot congeal in winter.
出自真心的友谊不会因逆境而冻结，如同泉水不会在冬天里结冻。
With the warm, soft, genial wind of spring, our wishes to New Year will melt the frozen Mount Tanggula.
携一阵和煦的春风，让我们新年的祝愿融化冰封的唐古拉山。
According to the meteorological observation in Minqin Desert Control Experiment Station, variations of frost-free period, low temperature in spring and frozen earth were analyzed.
以甘肃民勤治沙综合试验站数十年气象定点观测资料为基础，统计、分析了民勤荒漠区无霜期、春季低温、冻土层的变化特征。
The lengthwise cracks caused by frost heave, and settlement, bulge, rut caused by spring thaw are the main forms of frost damage of roads in seasonally frozen soil region.
冻胀形成的纵向裂缝和道路翻浆导致的沉陷鼓包及车辙变形是季节冻土区高速公路路基冻害的主要形式。
The lengthwise cracks caused by frost heave, and settlement, bulge, rut caused by spring thaw are the main forms of frost damage of roads in seasonally frozen soil region.
冻胀形成的纵向裂缝和道路翻浆导致的沉陷鼓包及车辙变形是季节冻土区高速公路路基冻害的主要形式。
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