“polar night”的概念、定义、翻译、参考文献-科学参考

单词	polar night
释义	polar night [`pō·lǝr `nīt] ^ASTRONOMY The period of winter darkness in the polar regions, both northern and southern.
随便看	fossil man fossil permafrost fossil reef fossil resin fossil soil fossil turbulence fossil wax fossorial Foster-Seely discriminator Foster's formula Foster's reactance theorem Foucault current Foucault knife-edge test Foucault mirror Foucault pendulum fougasse foulard foul berth foul bottom foulbrood foul foot Foulger's test fouling fouling factor fouling organism

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