单词	residence time
释义	residence time noun : the duration of persistence of a mass or substance in a medium or place (such as the atmosphere) Word History First Known Use 1954, in the meaning defined above
随便看	Brückner cycle brün Brüning brünn Brünn race brünnich's guillemot Brünnich's murre brā al-khay bs BS BSA BSAE BSArch bsarches bsarchs BSB BSc BSCCO BSCE BSCh bsche bsds bse BSE BSEc

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