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ACROSS
1)  (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
2)  an enzyme found in mammals that can catalyze the deamination of adenosine into inosine and ammonia
3)  the momentary present


DOWN
1)  imperial dynasty that ruled china (most of the time from 206 bc to ad 220) and expanded its boundaries and developed its bureaucracy; remembered as one of the great eras of chinese civilization
2)  a rapid active commotion
3)  a condensed but memorable saying embodying some important fact of experience that is taken as true by many people

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