名词解释：copyright
A copyright is title to certain pecuniary rights and, in most countries, certain moral rights for a specified period of time.
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名词解释：preferredstock
Thechallengeisnotoneofexpansion._______,therapidgrowthinenrollmentoverthelast40yearshascometoanend.
TheRomangoddessVenusisidentified_______theGreekgoddessAphrodite.
Theybuiltahighway_______themountains.