单词	supplementary angles
释义	supplementary angles plural noun : two angles or arcs whose sum is 180 degrees Word History First Known Use circa 1924, in the meaning defined above
随便看	psammophyte psammophytes psammophytic psammosere Psaronius PSC pschent pschents psec Psechridae Psedera psel pselaphid Pselaphidae pselaphognath Pselaphognatha pselaphognathous Pselaphus psellisms psellismuses pseneses psenesses psephism psephisma psephismas

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