“pergelation”的概念、定义、翻译、参考文献-科学参考

单词	pergelation
释义	pergelation [´pǝr·jǝ`lā·shǝn] ^HYDROLOGY The act or process of forming permafrost.
随便看	integrated ducted propeller integrated electronics integrated fire control system integrated inertial navigation system integrated information processing integrated information system integrated injection logic integrated neutron flux integrated optics main controller main crosscut main deck main diagonal main distributing frame Maindroniidae main effect main entry main exciter main fans main firing main frame main haulage main haulage conveyor main instruction buffer main joint

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