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hard standing
hard stuff
hard-times token
hard up
hard-wearing
hard wheat
hard-won
hard word
hard-working
hard yards
hard zero
Hardanger Fjord
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hard science

hard sci·ence (plural hard sci·enc·es)


noun 
Definition:
 
natural or physical science: a science such as physics, chemistry, geology, or astronomy in which data can be precisely quantified and theories tested

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