A patent gives inventors exclusive rights to their inventions for a fix period of time.
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Applied research aims at some specific objective, such as the development of a new produce, process, or material.
Moles are almost completely blind, although its tiny eyes can distinguish light from dark.
从2001年至2014年，我国毒品犯罪活动以案件数量和涉案人数来看，总体 ()
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