单词	sign of aggregation
释义	sign of aggregation noun phrase : any of various conventional devices (such as braces, brackets, parentheses, or vinculums) used in mathematics to indicate that two or more terms are to be treated as one quantity Word History First Known Use circa 1942, in the meaning defined above
随便看	fibrinopeptide fibrinopeptides fibrinous fibrins fibrisation fibrise fibrised fibrises fibrising fibrization fibrize fibrized fibrizes fibrizing fibro- fibro-cement fibroblast fibroblast growth factor fibroblastic fibroblasts fibrocartilages fibrocrystalline fibrocystic fibrocytes fibroferrite

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