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Recombinant DNA
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Ocular circle
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Microgravity
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Toslink
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NASA World Wind
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Warez
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Lux
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Virtual water
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Submarine canyon
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Palmer Drought Severity Index
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Brood
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Epicentre
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Anion
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EJP
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MSG
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Ecological corridor
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Omentum
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Oberon
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Constellation of Andromeda
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XOR
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Heliophile
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MAC
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Caucasian Elm
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Amphihaline
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Elastic mineral
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Brazing
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Peregrine falcon
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HMAC
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Antipyretic
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Alluvial deposit
pH
Hydrogen potential. pH is an index measuring the hydrogen ion activity in a solution. It is an indicator of the acidity (pH lower than 7) or alkalinity (pH higher than 7) of a solution.
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