单词	purple nutsedge
释义	purple nutsedge noun variants or less commonly purple nut grass : nut grass sense 1a Cyperus rotundus, commonly known as purple nutsedge or nutgrass, is considered one of the world's worst invasive weeds. Ranjodh Singh, The New York Times, 19 Aug. 2014 Word History First Known Use 1988, in the meaning defined above
随便看	gene flow gene frequency gene mutation gene mutations gene pool gene therapist gene therapy gene-splicing gene-spread gene-string genealogical genealogically genealogies genealogise genealogised genealogises genealogising genealogist genealogists genealogize genealogized genealogizer genealogizes genealogizing genealogy

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