单词	back focus
释义	back focus noun : the distance from the rear glass surface of a photographic lens to the focal plane when the lens is focused on a very distant object Word History First Known Use 1868, in the meaning defined above
随便看	drink-driver drink-driving drinkabilities drinkability drinkable drinkablenesses drinkabler drinkables drinkablest drinker drinkers drinkery drinking drinking (in) drinking age drinking fountain drinking game drinking in drinking problem drinking song drinking songs drinking to drinking up drinking water drinkings

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