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activating reagent activating receptor activation activation analysis activation cross section
activation energy activation record activator activator ribonucleic acid active accommodation
active anaphylaxis active antiroll system active area active balance active center
active chaff active communications satellite active component active computer active controls technology
active-cord mechanism active current active detection system active device active door
active earth pressure active electric network active electronic countermeasures active element active entry
active file active filter active front active galaxy active glacier
active homing active illumination active immunity active infrared detection system active jamming
active layer active leaf active leg active location system active logic
active margin active master file active master item active material active mirror
active permafrost active power active prominence active prominence region active region
active satellite active site active sludge active solar system active solid

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