“冻土变化”的概念、定义、翻译、参考文献-科学参考

单词	冻土变化
释义	冻土变化 Encyclopedia 工学冰冻圈变化释 permafrost degradation冻土变化冻土指温度低于0℃并含有冰的土或岩层。全球不同地区冻土在面积、温度、活动层厚度等方面均有一定差异。
随便看	principal subspace principal surface principal symbol principal symbol sequence principal system principal tangent principal tangent bundle principal telescope principal term principal theorem principal trace principal translation principal two-sided ideal principal type principal ultrafilter principal uniformization principal uniformizing function principal unknowns principal value principal value integral principal vanishing point principal variable principal vector principal vertex principal vertical circle

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