单词	dumpy level
释义	dumpy level noun : a surveyor's level with a short telescope rigidly fixed and rotating only in a horizontal plane Word History First Known Use 1838, in the meaning defined above
随便看	hydroxyethylation hydroxyl hydroxyl-herderite hydroxylamine hydroxylamines hydroxylammonium hydroxylapatite hydroxylapatites hydroxylase hydroxylases hydroxylate hydroxylated hydroxylates hydroxylating hydroxylation hydroxylations hydroxylic hydroxyls hydroxymethyl hydroxymethylation hydroxymethyles hydroxymethyls hydroxynaphthoic acid hydroxyproline hydroxyprolines

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