单词	R and D
释义	R and D abbreviation or noun ˌär-ən-ˈdē : research and development Word History First Known Use 1952, in the meaning defined above
随便看	tuned-in tuneful tunefully tunefulness tunefulnesses tuneless tunelessly tunelessnesses tuner tuners tunes tunes in tunes out tunesmith tunesmiths tuneups tung tung hai tung oil tung oil tree tung tree Tung-hu tungae Tungan tungans

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