单词	frost ring
释义	frost ring noun : a false annual ring in the trunk of a tree that is often evident only as a brownish line of collapsed or abnormal cells and is caused by defoliation due to frost and subsequent leafing out again Word History First Known Use 1896, in the meaning defined above
随便看	groynes grozart grozer grozing iron Grozny groznyy GRP GRU grub grub (about) grub about grub ax grub hoe grub hook grub screw Grub Street grubbed grubbed (about) grubbed about grubber grubbers grubbier grubbies grubbiest grubbilier

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