单词	accretion borer
释义	accretion borer noun : a hollow auger used for cutting out from a tree a core from which accretion is estimated by counting annual rings Word History First Known Use 1887, in the meaning defined above
随便看	books off bookseller booksellers bookselling booksellings bookshelf bookshelves bookshop bookshops bookstack bookstall bookstalls bookstands bookstore bookstores booksy bookwork bookworks bookworm bookworms booky bool Boolean Boolean algebra booleaner

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