“permafrost degradation”的概念、定义、翻译、参考文献-科学参考

单词	permafrost degradation
释义	permafrost degradation 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	Helly number Helly principle of selection Helly selection theorem Helly theorem Helly-type theorem Helmert Helmert-Pearson distribution Helmert，F.R. helmet helmet mounted display helmet mounted display, HMD helmet-mounted display system helmet-mounted sight helmet shell helmet straps helmet streamer helm graph Helmholtz helmholtz Helmholtz Association of German Research Centres Helmholtz capacitor model Helmholtz Center for Materials and Energy Helmholtz Centre for Heavy Ion Research Helmholtz Centre for Ocean Research Helmholtz coil

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。