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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Sofarscientistshaveonlyacquired________understandingofthephysicalprocessesthatcauseearthquakes.
There are many sales this season, during which stores will lower their _______ prices.
The challenge is not one of expansion. _______, the rapid growth in enrollment over the last 40 years has come to an end.
Iwouldlove________tothepartylastnightbutIhadtoworkextrahourstofinishareport.